1. The center of the above explanation is ( ).

D. The history of mirrors

2. Use the words in the text to summarize the characteristics of several mirrors.

①Bronze mirror----dark------ ②Silver mirror---expensive-------- ③Steel mirror-----too easy to rust- --------- ④Glass mirror----Bright and big------------------

3. Above When introducing several types of mirrors, the main order of explanation is: --Total score------------------; the detailed description is:-----Bronze mirror--- ------------------------------------.

4. Translation: "You can know gains and losses by using people as mirrors." - Mirrors are indispensable in our lives. Only by looking in the mirror often can you discover the flaws in your own image at any time, and try to make up for your shortcomings to make yourself more tasteful and perfect.

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