已知等腰直角三角形ABC中，∠B=90°，AC，BC的中点分别是D，E，沿DE把

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问题选择题

已知等腰直角三角形ABC中，∠B=90°，AC，BC的中点分别是D，E，沿DE把该三角形折成直二面角，此时斜边AC被折成折线ADC，则∠ADC等于[ ]

A．150°

B．135°

C．120°

D．105°

答案

答案：C

阅读理解

阅读短文，判断下列句子正(T)误(F)。

I am a little fish. I live in the sea. It is dark (黑暗的) there, but I am not afraid. There are so many fish

living near me that I always have lots of friends.

I feel happy very much, because I love to swim. My mother often warns (警告) me to be careful (小心的)

because some big fish may eat me up. I know that she is right. Mother loves me and I love her, too.

短语注释： ①so…that… 如此……以致 ②warn …to do 警告……做…… ③eat up 吃(光)

( ) 1. My home is in the sea.

( ) 2. I like swimming.

( ) 3. I have many classmates.

( ) 4. If I am not careful enough, some big fish may kill me.

( ) 5. Mother and I love each other.

判断题

两个因数分别是12和8，如果把8改为80，乘积比原来扩大10倍。[ ]