Episode 1: The Roller Coaster Murder Incident (Gravity)
The Roller Coaster Murder Incident relies on gravity to generate high speeds.
The force generated due to the attraction of the earth is called gravity. The direction is vertically downward. Size: G=mg. The position of the center of gravity is related to the geometry and mass distribution of the object.
Gravity is not equal to the earth's gravitational pull on objects. Due to the rotation of the earth itself, except for the two poles, objects on the ground at other places follow the earth in uniform circular motion around the earth's axis. This requires a centripetal force pointing vertically towards the earth's axis. This centripetal force can only be caused by the earth's gravitational pull on the object. To provide, we can decompose the earth's gravitational pull on the object into two components. One component, F1, points toward the earth's axis and is equal to the centripetal force required for the object to move in a uniform circular motion around the earth's axis. The other component, G, is the force exerted on the object by Gravity (picture) where F1=mw2r (w is the angular speed of the earth's rotation, r is the radius of rotation of the object), it can be seen that the size of F1 is zero at the poles, increases with decreasing latitude, and is the maximum F1max in the equatorial region. Because the centripetal force of an object is very small, under normal circumstances, the gravity of an object can be considered to be the magnitude of universal gravitation, that is, the effect of the earth's rotation can be ignored under normal circumstances.
Episode 2: The Kidnapping of the Chairman’s Daughter (Chimney)
The chimney is a tool used to remove gas or smoke caused by fire.
The materials are generally divided into several types: iron, asbestos, and ceramics. These types are generally used in small places, such as homes, offices, etc.
In addition, there are also those built with bricks, mostly cylindrical, thin at the top and thick at the bottom. They are generally used in large industrial factories, such as large boilers, smelting plants, etc.
Episode 3: Idol Secret Room Murder Case (Ice)
Water in nature has three states: gas, solid and liquid. Liquid water is called water, gaseous water is called water vapor, and solid water is called ice.
Episode 4 Metropolis Code Map Incident (Specular Reflection)
As the name suggests, it is a reflection phenomenon that occurs on a smooth surface like a mirror. Under the illumination of parallel light, all The light rays are all reflected in the same direction.
Episode 5: The Shinkansen Explosion Incident (Shinkansen)
The Origin of the Shinkansen
In the second half of the 1950s after World War II, Japan’s economic development was rapid The Tokaido railway line in the Keihin, Chukyo and Hanshin areas, where the industrial, commercial and distribution industries are particularly developed, only accounts for 3% of the total length of Japan's railways, but it is responsible for 24% of the country's total passenger volume and 23% of the total freight volume. Transportation capacity has been reached. In December 1958, the Japanese Cabinet meeting approved the idea of ??building the Tokaido Shinkansen.
The Tokaido Shinkansen, which began operation when the 1964 Olympic Games was held in Tokyo, not only required a huge investment totaling 380 billion yen, but also needed to ensure the safety of high-speed operation at 200 kilometers per hour. Since the Shinkansen can organically connect Keihin, Chukyo, Hanshin industrial and commercial zones and intermediate cities within 4 hours, it has greatly promoted the formation of new industries along the Shinkansen.
Technical characteristics of the Shinkansen
The Shinkansen uses a decentralized power operation method instead of using a locomotive for traction. The wheels of each carriage are equipped with driving devices - electric motors. The power dispersion method not only does not require heavy locomotives, but is also easy to accelerate or decelerate, and can be flexibly grouped according to passenger transportation conditions, which not only reduces construction costs but also improves economic benefits. With the rapid development and application of semiconductor technology, the brakes of Shinkansen trains have also been changed from the original mechanical type to electric type. When the train brakes on a slope, the electric motor becomes a generator, and the current is converted and recycled. , thus saving energy.
Since the Shinkansen began operation in 1964, there has not been a single accident causing casualties to passengers. This is because the Shinkansen is equipped with multiple safety systems. The Shinkansen can be driverless. The reason why a driver is required is to enable the train entering the station to stop at the specified position on time according to the conditions in the station, and to prevent passengers from being uncomfortable due to emergency braking. Currently, the country's five Shinkansen lines carry 750,000 passengers every day.
The role of the Shinkansen
In the past, it took 6.5 hours to take a train from Tokyo to Osaka, but now it only takes 2.3 hours. The average hourly wage of Japanese people is 2,500 yen, which alone saves more than 30 trillion yen. More importantly, the Shinkansen has promoted local economic development. According to surveys, the Tokaido Shinkansen and Sanyo Shinkansen have about 200 million passengers every year. The resulting consumer spending on food, accommodation, tourism, etc. is about 5 trillion yen, and creates 500,000 jobs. With the formation of the Shinkansen transportation network, the scope of people's activities has expanded. For example, if people living in Shizuoka and other places want to watch the traditional arts "Kabuki" or "Bunraku", they have to go to Tokyo or Osaka. In the past, it took two days, but now they can go back and forth on the same day. Urasa Town in Niigata Prefecture is a typical mountain town with only 20,000 people, but an international university that attracts students from all over the world is located here.
Since the Hokuriku Shinkansen has a station in Urasa, it only takes at most one hour for teachers from international universities to go to Niigata or Tokyo, and the natural environment here cannot be enjoyed in the city. Therefore, a large number of international universities have gathered. High level of talent.
When foreigners visit Japan, they always hope to take a Shinkansen ride and experience first-hand the safety, speed and comfort of this "bullet train", the first of its kind in Japan.
The full name of Shinkansen is "High-speed Railway Transport System Shinkansen". What runs on the railway is a special electric train. The locomotive is streamlined, like a giant bullet, and it drives like a bullet roaring out of the barrel. It moves forward, so it is called the "Bullet Train".
The carriages of the "Bullet Train" are spacious, neat and clean, and the windows are well-sealed. When traveling at high speed, not only the car body is stable, but the noise is also very small. The equipment in the car is complete, with free drinking water facilities, clean toilets, telephone rooms, and heating and cooling air conditioning. The flight attendants are also very polite and have a high level of service. It makes people feel that taking the train is also a kind of enjoyment.
Now the Shinkansen has been continuously updated and some novel vehicles have been added. The carriage has been converted into a double-decker type (has been scrapped), radio headphones are installed on the armrests of the seats, and coffee and newspapers are provided free of charge. There are also several large restrooms in the car, equipped with hot showers, so that passengers can not only eat on the car, but also wash up in the car. Some vehicles even come with private cabins. This provides greater convenience to commuters and travelers, making the utilization of the Shinkansen higher and higher. At present, the annual carrying capacity of Japan's Shinkansen exceeds 140 million passengers, which exceeds the population of Japan.
Japan's Shinkansen was planned and constructed in the 1960s, and four of them are very famous:
Tokaido Shinkansen
Sanyo Shinkansen
Tohoku Shinkansen
Joetsu Shinkansen
In addition, the Hokkaido Shinkansen, Kyushu Shinkansen (New Yatsushiro-Kagoshima Chuo Section operation), Nagasaki Shinkansen, etc. are under construction middle. The opening of the Shinkansen has brought great convenience to Japan's transportation, thus promoting the development of Japan's economy and all aspects. Also, Japan has developed a maglev train, a contactless transportation train that relies on electromagnetic repulsion to completely detach the train from the track and travel in suspension. At present, this kind of train has been successfully driven experimentally. Riding on this train feels as smooth and comfortable as flying, but makes less noise than a passing car.
Episode 6 Valentine’s Day Murder (Chocolate)
Chocolate is the transliteration of the foreign word Chocolate. Its main raw material is cocoa beans (cocoa beans (coconut-like fruits, which grow on the trunk) It has a very early origin, starting with Montezuma, the last emperor of the Astica dynasty in Mexico. At that time, it was a society that worshiped chocolate and liked to eat chili peppers, paprika, vanilla beans and spices. Add it to drinks, make foam, and drink 50cc every day from a golden cup. It is a drink belonging to members of the royal court. Its scientific name Theobroma means "drink of the gods" and it is regarded as a valuable cardiotonic and diuretic medicine. It has an activating effect on protein-degrading enzymes in gastric juice and can help digestion.
The earliest chocolate originated from a food containing cocoa powder of the ancient Indians in Mexico. It tastes bitter and spicy. In 1526, the Spanish explorer Cortes brought it back to Spain and presented it to the then king, which made Europeans regard it as a drug and set off a craze. Later, around the 16th century, the Spanish made chocolate "sweet". They mixed cocoa powder and spices into cane juice to make a sweet drink. In 1876, a Swiss named Peter was creative and added some milk to the above-mentioned drink, thus completing the entire process of modern chocolate creation. Soon after, someone came up with the idea of ??dehydrating and concentrating liquid chocolate into pieces of chocolate candy that were easy to carry and store. In 1828, Van Houten of the Netherlands had the idea to remove 2/3 of the fat to make cocoa that was easy to drink. At the end of the 19th century, D.M. Bede of Switzerland invented the idea of ??adding milk to chocolate to make it taste better, which was the prototype of today's chocolate.
Episode 7: One gift threat per month (barcode)
Barcode is a mark composed of a set of regularly arranged bars, spaces and corresponding characters. "Bar" refers to For the part with low light reflectivity, "empty" refers to the part with high light reflectivity. The data composed of these bars and spaces express certain information and can be read by specific equipment and converted into binary data compatible with computers. and decimal information. Usually, for each item, its code is unique. For ordinary one-dimensional barcodes, the corresponding relationship between the barcode and product information must be established through a database. When the barcode data is transmitted to the computer, it is processed by the computer. Applications operate and process data. Therefore, ordinary one-dimensional barcodes are only used as identification information during use, and their meaning is achieved by extracting the corresponding information from the database of the computer system.
Advantages of barcode technology
Barcode is by far the most economical and practical automatic identification technology.
Barcode technology has the following advantages
A. Fast input speed: Compared with keyboard input, barcode input is 5 times faster and can achieve "instant data input".
B. High reliability: the error rate of keyboard input data is one in three hundred, the error rate of using optical character recognition technology is one in ten thousand, and the error rate of using bar code technology is less than one in a million.
C． Large amount of information collected: Traditional one-dimensional barcodes can collect information of dozens of characters at a time, while two-dimensional barcodes can carry information of thousands of characters and have certain automatic error correction capabilities.
D. Flexible and practical: Barcode identification can be used alone as a means of identification, or it can be formed into a system with related identification equipment to achieve automatic identification, and it can also be connected with other control equipment to achieve automated management.
In addition, barcode labels are easy to produce and have no special requirements for equipment and materials. The identification equipment is easy to operate and does not require special training, and the equipment is relatively cheap.
Encoding rules
Uniqueness: Products of the same type and specifications should correspond to the same product code, and products of the same type and specifications should correspond to different product codes. Different product codes are assigned according to the different properties of the product, such as weight, packaging, specifications, smell, color, shape, etc. Permanence: Once a product code is assigned, it cannot be changed and is lifelong. When such a product is no longer produced, its corresponding product code can only be put on hold and cannot be reused or allocated to other products. Meaningless: In order to ensure that the code has enough capacity to adapt to the needs of frequent product updates, it is best to use meaningless sequence codes.
The difference between barcode coding systems
UPC: (Unified Product Code) can only represent numbers. There are four versions: A, B, C, D, and E. Version A - 12-digit version E - The last digit of the 7-digit number is the check digit. The size is 1.5" wide and 1" high, and the background must be clear. Mainly used in the United States and Canada, used in industry, medicine, warehouses and other sectors
< BR>When UPC is decoded as twelve digits, the definition is as follows: First digit = numeric identifier (already established by the UCC (Uniform Code Committee)). Digits 2-6 = Manufacturer's identification number (including the first digit) ) No. 7-11 = unique manufacturer product code No. 12 = check digit (used for error detection)
Code 3 of 9: Can represent ***43 letters, numbers and other symbols Characters: A -Z, 0 - 9, -.$/+%, pace The length of the barcode is variable. Usually "*" is used as the starting and ending character. The check code is not used. The code density is between 3 and 9.4 characters. /The blank area per inch is 10 times that of the narrow strip. It is used in industry, books, and ticket automation management
Code 128: represents high-density data, string variable length symbol contains check code There are three different versions: A, B, and C. The available 128 characters are used in three string sets A, B, or C for industry, warehouse, retail and wholesale.
Interleaved 2-of-5 (I2 of 5): Can only represent numbers 0-9. Variable-length continuous barcodes. All bars and spaces represent codes. The first number starts with a bar and the second number consists of spaces. The blank area is 10 wider than the narrow bar. It has a high reading rate for barcodes in wholesale goods, warehouses, airports, production/packaging identification, and industry. It can be used for fixed scanners to scan reliably. It has the highest density among all one-dimensional barcodes
Codabar ( Qudba barcode): can represent numbers 0 - 9, characters $, +, -, and four characters a, b, c d that can only be used as start/terminator
Variable length There is no check digit used in material management, libraries, blood banks and current airport parcel delivery. The blank area is 10 times wider than the narrow strips of non-continuous barcodes, and each character is represented as 4 strips and 3 spaces
PDF417 (QR code): A multi-line barcode does not need to be connected to a database. It can store a large amount of data. It is used in: hospitals, driver's licenses, material management, and cargo transportation. When the barcode is damaged to a certain extent, error correction can make the barcode correct. Decode PDF417, a product developed by Symbol Technology Company in 1990. It is a multi-line, continuous, variable-length symbolic identifier that contains a large amount of data. Each barcode has 3-90 lines, and each line has a start part, data part, and end part. Its character set includes all 128 characters, and the maximum data content is 1850 characters.
One-dimensional barcodes only express information in one direction (usually the horizontal direction), but do not express any information in the vertical direction. Their certain height is usually to facilitate the alignment of the reader.
The application of one-dimensional barcodes can increase the speed of information entry and reduce the error rate, but one-dimensional barcodes also have some shortcomings:
* Small data capacity: 30 characters Left and right
* Can only contain letters and numbers
* Barcode size is relatively large (low space utilization)
* Barcode cannot be read if it is damaged
Episode 9: Tenkaichi Night Festival Murder Case (Camera)
A camera is an optical device used for photography. After the light reflected from the scene being photographed is focused through the photographic lens (objective lens) and the shutter that controls the exposure, the scene being photographed forms a latent image on the photosensitive material in the camera obscura, which is then processed (i.e. developed, fixed) to form a permanent image. image, this technique is called photography.
The earliest camera structure was very simple, including only a camera obscura, a lens and photosensitive materials. Modern cameras are relatively complex, with systems such as lens, aperture, shutter, ranging, framing, metering, film transport, counting, and Selfie. It is a complex product that combines optics, precision machinery, electronic technology, chemistry and other technologies.
Before 400 BC, there were records of pinhole imaging in the "Mo Jing" written by Mozi; in the 13th century, image obscura made using the principle of pinhole imaging appeared in Europe, and people Walk into the camera obscura to watch images or paint scenes; in 1550, Italy's Cardano placed the lenticular lens in the original pinhole position, and the image effect was brighter and clearer than the camera obscura; in 1558, Italy's Barbaro made another The addition of an aperture to Dano's device greatly improved the image clarity; in 1665, the German monk John Chapter designed and produced a small, portable single-lens reflex camera obscura. Because there was no photosensitive material at the time, this camera obscura only Can be used for painting.
In 1822, Niépce of France produced the world's first photograph on photosensitive material, but the image was not very clear and required eight hours of exposure. In 1826, he took a photo through a camera obscura on a tin base plate coated with photosensitive asphalt.
In 1839, Daguerre of France made the first practical daguerreotype camera. It consisted of two wooden boxes. One wooden box was inserted into the other to adjust the focus. Use the lens cap as a shutter to control exposure times of up to thirty minutes to capture clear images.
In 1860, Sutton of England designed a primitive single-lens reflex camera with a rotatable mirror viewfinder; in 1862, Detry of France stacked two cameras together to create a Only taking pictures and taking pictures constitute the original form of a double-lens camera; in 1880, Baker in England made a double-lens reflex camera.
With the development of photosensitive materials, dry plates coated with silver bromide photosensitive material appeared in 1871, and in 1884, films using nitrocellulose (celluloid) as the base film appeared.
Episode 10: Football player intimidation incident (electronic game console)
After World War II, computer technology has developed rapidly. First, transistors replaced bulky vacuum tubes. Later, integrated circuits and large-scale integrated circuits appeared, allowing electronic subcomputers to be updated from generation to generation. At the same time, software technology also developed rapidly. In the United States, there are many computer software design talents. After work, they often like to program a "game" that can compete with others to exercise their programming skills. This kind of "game" comes in many varieties, but its characteristics are that it uses the "analysis" and "judgment" abilities designed in advance by computer software to compete with others. Due to constant modifications and updates, the "intelligence" level of computers is indistinguishable from that of humans.
Nolan Bushnell, an electrical engineer in California, USA, saw the prospects of this "game". As early as when he was in college, Bushnell had run a casino and was well versed in the secrets of casino management. Therefore, in 1971, Bushnell designed the world's first commercial electronic game console based on his own "tennis" game. This electronic tennis game machine had a rather dramatic experience: In order to see if it would be accepted by people, Bushnell negotiated with the owner of a nearby entertainment venue and placed it in a corner of the entertainment venue. Within two days, his boss called and told him that the so-called "electronic game console" was broken and asked him to repair it. Bushnell opened the case and found to his surprise that the coin box was completely filled with coins, thus filling the coin box. The success inspired Bushnell to further develop and produce electronic game consoles, for which he founded the world's first electronic game company, Atari Corporation.
Today, when we look back at why video games initially attracted people, it is not difficult for us to realize this truth: video games satisfy people’s desire for competition and confrontation, and they always give competitors new perspectives. problem. At the same time, it can also provide the winner with a new picture and music enjoyment. After all, street entertainment venues are not as casual and economical as playing at home. As a result, electronic game consoles began to develop in the direction of "family-oriented". Breakthroughs in electronic technology promoted the development process of "family-oriented" game consoles. The popularization of color TVs enabled the picture tubes and scanning boards of large-scale game consoles to be fully color-coded. The replacement of televisions separated the microprocessor part from the display screen.
The game console produced at this time is only equivalent to a signal generator, which is connected to a television to form a closed-circuit television system. This kind of electronic game console is generally called a "home computer game console" or simply a "television game console".
Episode 11: Piano Sonata Moonlight Murder (Staves)
The notation method commonly used in the world. A method of recording music by marking five equidistant parallel horizontal lines with notes and other symbols of different durations.
Each line of the staff and the space between the lines are called line 1, line 2, line 3, and line 4 from bottom to top. , Line 5 and Room 1,
Room 2, Room 3, and Room 4. If the lines and spaces are not enough, you can add lines and spaces above or below the staff
. The plus line and the plus room are respectively called the upper plus 1st line, the upper plus 1st room; the lower plus 1st line, the lower plus 1st room, etc., each representing 1
< p>tone level. The fixed height of these steps is determined by the clef used. There are three types of clefs: treble clef, also known as G clef; bass clef, also known as F clef; alto clef, also known as C clef . In order to adapt to the needs of people's voices and musical instruments in different vocal ranges and to avoid excessive addition of lines, there are many kinds of staffs, of which 5 are commonly used: Treble clef (with G clef), bass clef (withF clef), soprano clef, alto clef, lower alto clef (the last three types
Use C clef). The soprano clef is not commonly used anymore, the alto clef is only used for the viola, and the tenor clef is often used for the higher notes of the cello, bassoon, and trombone. district. In addition, there are alto clefs, mezzo-soprano clefs, etc.
Staves are generally classified into: ① Full score, which records ensemble or chorus music.
Staves are composed of many single-line scores. ② Score, record the score of each musical instrument or each part separately. ③The large staff is composed of the treble staff and the bass staff. It is used for piano, organ, harp, mixed chorus, etc.
There is a temporary extra line hidden in the two staves to represent the middle C, so it is also called the eleven-line major
Staff.
Episode 12 Ayumi’s Kidnapping Incident (Script)
The script of a stage play, movie play, radio play or TV series; specifically refers to a stage play, movie play, radio play or TV series Typescript or mimeographed or published text
Scripts are mainly speaking style, a literary style that expresses the storyline, and is the textual basis for dramatic performances. In the field of literature, it is a special genre of literary works; in the field of dramatic practice, it is the foundation and starting point of dramatic activities.
The script mainly consists of dialogues, monologues, narrations and stage instructions of the characters in the play. Dialogues, monologues, and narrations all use spoken words, and in operas and operas they are often expressed in libretto. The stage directions in the script are narrative descriptions written in the tone of the playwright, including an explanation of the time and place where the plot takes place, a description of the image characteristics, body movements and inner activities of the characters in the play, and a description of the scene, Description of the atmosphere, as well as requirements for scenery, lighting, sound effects, etc.
Episode 13: Strange Relative Search and Murder Case (Potassium Cyanate)
Chinese name: potassium cyanate
English name: potassium cyanate
< p>Density 2.056Characteristics
White tetragonal crystal.
Solubility
Soluble in water, rarely soluble in ethanol.
Uses
Used in organic synthesis and preparation of hypnotics, anesthetics, etc. Can also be used as a herbicide.
Preparation or source
It is obtained by grinding potassium cyanide and lead oxide and heating, and then crystallizing in water or dilute ethanol.
Others
Decomposes at 700~900℃.
Episode 14: Mysterious Message Blocking Incident (Rifle)
A rifle is a long-barreled firearm that can be fired from the shoulder of an individual soldier. It is mainly used to fire bullets and kill exposed people. target, the effective range is generally 400 meters. In hand-to-hand combat, bayonets and gun butts can also be used for hand-to-hand combat. Some can also launch rifle grenades, and have point and area destruction and anti-armor capabilities.
Rifles can be divided into three types according to the degree of automation: non-automatic, semi-automatic and fully automatic; according to their uses, they can be divided into ordinary rifles, mounted rifles (carbines), assault rifles and sniper rifles.
Episode 16 Antique Collector Murder Case (Japanese Sword)
Japanese Sword (にほんとう, Nihontou), improved from the Tang Sword of the Tang Dynasty, also known as For the knife (かたな, Katana). The full name is Plane Fragment Complex Dark Light Pattern Blade, one of the three most famous knives in the world. According to the shape and size, they are divided into tachi, tachi (sword), wakizashi (wakizashi), short sword, etc. In a broad sense, it also includes scrolls, razors, swords, guns, etc.
Since ancient times, they have been used as weapons and are known for their beautiful shapes. Many famous swords have been collected as works of art and contain the symbolic meaning of the soul of the samurai. Unlike knives from other countries, one of the biggest features of Japanese knives is that in addition to the decorative appearance, the body itself shows an artistic sense. Knife makers in Japan are called "swordsmiths", "swordsmiths", or "swordsmiths".
Episode 17: Department store kidnapping incident (elevator lady)
A waiter responsible for operating elevators and shopping guides in shopping malls.
Episode 27: The Kogoro Classmate Reunion Murder Case (Part 1) (Hot Springs)
Hot Springs
The formation of hot springs The formation of hot springs, generally speaking It can be divided into two types: one is formed by magma inside the earth's crust, or is accompanied by volcanic eruptions. The extinct volcanic terrain area where volcanoes have been active has a surface that has been raised due to the movement of crustal plates, and there are still uncooled layers underground. Magma will continuously release a large amount of heat energy. Due to the concentration of heat from such heat sources, as long as there are water-bearing rock formations with pores nearby, they will not only be heated into high-temperature hot water, but most of them will boil into steam. Mostly sulfate springs. The second is formed by the infiltration and circulation of surface water. That is to say, when rainwater falls on the surface and penetrates downward, it penetrates deep into the aquifers deep in the earth's crust to form groundwater (sandstone, conglomerate, volcanic rock, these are good aquifers). Groundwater is heated by the geothermal energy below to become hot water. Most of the deep hot water contains gases. These gases are mainly carbon dioxide. When the temperature of the hot water rises, if there are dense and impermeable rock layers blocking its way, the pressure will become higher and higher. , so that hot water and steam are in a high-pressure state, and will rush up as soon as there is a crack. After the hot water rises, the pressure gradually decreases as it gets closer to the surface. As the pressure gradually decreases, the gas contained in it gradually expands, reducing the density of the hot water. These expanded vapors are more conducive to the rise of the hot water. The rising hot water then repeatedly circulates with the sinking cold water that is heated later due to the pressure (difference in hydrostatic pressure) due to the different densities to produce convection. When the resistance of the open fissure is small, the hot water rises along the fissure and gushes out of the surface. That is to say, it continuously rises and eventually flows out of the ground to form a hot spring. Due to the terrain of high mountains and deep valleys, the surface water at the valley bottom may be lower than the groundwater level in the mountains. Therefore, the bottom of the deep valley may be the place where the hydrostatic pressure difference is the largest, and the upwelling of hot water should also be the most likely to gush out from the valley bottom, where most hot springs occur. On the river bed in the valley. Generally speaking, the formation of hot springs requires the following three conditions: (1) There must be hot water underground; (2) There must be a hydrostatic pressure difference that causes hot water to rise; (3) There must be deep and long fissures in the rocks for hot water to reach. ground.
Episode 28: The Murder Case at Kogoro's Classmate Reunion (Post-edited) (Table Tennis Grip)
The table tennis grip is divided into a straight grip and a horizontal grip. There are two methods. Different holding methods have their own advantages, resulting in various different playing styles.
1. Pen-hand grip
The characteristic of the pen-hand grip is that both the forehand and backhand use the same racket surface to hit the ball. The shot is fast, the forehand attack is fast and powerful, and the forehand attack is fast and powerful. , When hitting a straight ball, the racket surface does not change much, making it difficult for the opponent to judge. This is how I play now.
2. Horizontal grip
I have played this way before, but in the end, I changed to a straight grip because I didn’t have a good grip! The characteristic of the horizontal grip is that the forehand and backhand attack force is strong, the grip changes little when attacking the ball, and the backhand attack is easy to exert force and make loops; however, when hitting the ball alternately with the forehand and backhand, the bat face needs to be changed , when attacking obliquely or straightly, the range of adjustment of the racket shape is large, and it is easy for the opponent to see through.
(1) Regardless of the grip method, the grip should not be too tight or too loose. If it is too tight, it will stiffen the wrist and affect the wrist movement when exerting force. If it is too loose, it will affect the power and accuracy of the ball.
(2) The grip should not be too shallow. When holding it straight, the pincer shape formed by the index finger and thumb cannot be too large or too small, so as not to affect the flexibility of the wrist movement.
(3) Make full use of your fingers when changing the bat surface and adjusting the angle of the bat surface.
(4) Don’t imitate me and change the way you hold the racket, otherwise it will affect the formation of your playing style and style, especially beginners, you should pay more attention
Episode 34 Villa Bandage Monster Murder Case (Part 1) (Bandage)
Bandage: Gauze roll is the most versatile and convenient bandaging material. Scroll bandages are divided into single-headed bandages and double-headed bandages according to the form of the scroll; that is, a bandage is rolled up from both ends, or two single-headed bandages can be connected together, etc.
When applying bandages, you should pay attention to the following usage principles:
First aid personnel must face the wounded and take a suitable position.
The wound must be covered with sterile gauze first and then a bandage.
When bandaging, hold the bandage head in your left hand and the bandage roll in your right hand, with the outside of the bandage close to the part.
When bandaging, the wound should be wrapped from the lower part of the wound upward, usually from left to right, and from bottom to top.
The bandage should not be too tight to avoid local swelling, nor should it be too loose to avoid slipping.
In order to maintain the functional position of the limbs, the arms should be bandaged in a bent manner, and the legs should be bandaged straight.