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【单选题】
光缆施工中，光缆的弯曲半径不得小于其外径的（）倍。A.
10
B.
15
C.
20
D.
25
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A.
正确
B.
错误
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A.
Appeal to
B.
set dates for
C.
Give himself the axe
D.
make/draw an analogy
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A.
concerned
B.
cared
C.
thought
D.
come
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A.
减小而 不变。
B.
减小而 增大
C.
增大 而 减小
D.
不变而 增大
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A.
Z减小λ不变
B.
Z减小λ增大
C.
Z增大λ减小
D.
Z不变λ增大
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A.
mustn’t smoke
B.
did smoke
C.
should smoke
D.
not smoke
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