沟底宽度随光缆数目而变,一般为1~2条光缆,沟底宽度和上宽分别为( )。A.200mm,400mm B.300mm,500mm C.300mm,600mm D.

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问题 沟底宽度随光缆数目而变,一般为1~2条光缆,沟底宽度和上宽分别为( )。

选项 A.200mm,400mm
B.300mm,500mm
C.300mm,600mm
D.400mm,800mm

答案C

解析
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