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[名词解释] 船坞有效长度

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题目标签:长度船坞
参考答案:
参考解析:
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【单选题】To swim across the English Channel takes at least nine hours. It’s a hard work and it makes you short of breath. To fly over the Channel takes only twenty minutes, but it’s an expensive way to travel....

A.
not more expensive to be built than a bridge
B.
not more expensive to be built than a rail
C.
. cheaper to be built than a rail
D.
not cheaper to be built than a bridge

【单选题】腋杖长度最适宜为

A.
身高乘以47%
B.
身高乘以57%
C.
身高乘以67%
D.
身高乘以77%
E.
身高乘以87%