光缆接续中每公里中继段损耗为（）。A.0.15dB B.0.25db C.0.35d_爱下问搜题

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问题单项选择题

光缆接续中每公里中继段损耗为（）。

A.0.15dB

B.0.25db

C.0.35db

D.0.45db

答案

参考答案：B

完形填空

完形填空。

     Hello, I'm Mary. I'm 12. I  1 a little brother. He is 10.  2 name is Bill. We have different hobbies. (爱好).
     I like  3 TV very much. Our TV is  4 the living room (客厅). I like to watch basketball matches (比赛)
on TV. I think they're 5 . I like fruit, such as apples,  6  and so on. I also like carrots and eggs. I eat  7 them.
     Bill likes computer games. He thinks they're fun,  8 I think they're boring. Bill  9 fruit, but he likes French
flies and ice cream. And he also likes hamburgers. I don't think they're  10 . So (所以) I don't eat them often.

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单项选择题

用机械碾压法处理地基后可作为持力土层的地基是( )。

A．由建筑垃圾形成的杂填土以及冲填土组成的地基

B．不排水强度小于20kPa的饱和黏性土地基

C．工业废料和含有少量生活垃圾的杂填土地基

D．较厚的淤泥和淤泥质土