题目内容

简述精液槽(φ12*10):焊接标准及验收标准。

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If you are forced to abandon ship in a lifeboat,you should().

A. remain in the immediate vicinity
B. head for the nearest land
C. head for the closest sea-lanes
D. vote on what to do,so all hands will have a part in the decisio

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各级公路超高横坡度的最小值是()。

A. 1.5%
B. 2%
C. 3%
D. 路拱横坡度

船闸闸室结构形式有()和直立式两种。

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