Read the following materials to answer the following questions (8 points) Material 1: In response to the 20 1 1 International Year of Forests set by the United Nations, the secretariat of the Convention on Wetlands will place the world at 20 1 1. (1) low-lying; High latitude, low temperature and weak evaporation; There is frozen soil distribution, and surface water is not easy to infiltrate; The surrounding rivers are flooded with ice. (4 points)

(2)B(2 points)?

(3) Jiaodong is located in the temperate monsoon climate zone, and the seasonal and interannual variation of precipitation is great. The river runoff is small, and the regional distribution is significantly different. (2 points)

Test and analysis: (1) The formation conditions of wetlands are generally analyzed from the formation of a large amount of water on the surface, topography, rivers, soil and climate conditions. (2) Wetlands have the functions of soil and water conservation and climate regulation, so after the destruction of wetlands, the annual temperature rises and the seasonal variation of river flow increases. (3) The main natural reasons that affect the distribution of water resources can be analyzed from climate (precipitation and evaporation), topography, rivers and other factors.

Comments: This topic is generally difficult. Students should master the basic analytical thinking of regional geography, the main factors affecting the formation of wetlands, the environmental functions of wetlands and the main natural conditions affecting the distribution of water resources, and pay attention to the integrity of analysis.