In a Williamson turn，the rudder is put ove

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问题单项选择题

In a Williamson turn，the rudder is put over full until the（）.

A.vessel has turned 90°From her original course

B.vessel has turned 60°From her original course

C.vessel is on a reciprocal course

D.emergency turn signal sounds

答案

参考答案：B

选择题

_______, babies begin to talk between 12 and 15 months, but they can use body language to

communicate before they begin to speak. [ ]

A. In common

B. In particular

C. In general

D. In public

单项选择题

高压缸采用双层缸，为了提高启机速度，减小温差，高压缸还设有（）装置。

A.法兰加热

B.电加热

C.螺栓加热

D.汽缸、法兰螺栓加热