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问题 判断题

OTDR测试曲线中，横坐标表示距离，纵坐标表示相应距离处延光纤前向传播的光功率。

答案

参考答案：错

填空题

在□里填上合适的数。   

□÷（54÷6）=8                 □÷3-15=4
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填空题
用方框里所给词的适当形式填空。
swim    in    be    like    work    of    lot    study    do    at
       I have a happy family. There   1   three people   2   my family, my father, my mother and I. My father   3  
in a factory. He makes   4   of machines. My mother is a teacher   5   English. I   6   in a secondary school. My
father is forty. He works hard. My mother is very busy. After work, she   7   the cooking   8   home. I like   9  .
Mother doesn't like it. But she   10   singing. She sings very well. What a happy life we are having!
1.                2.                3.                4.                5.                
6.                7.                8.                9.                10.              
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