The pilot will()your ship at 2015 hours tonight.
A. aboard
B. board
C. go ahead
D. go forward
用()配重法调整动平衡,是一般工作现场也可以进行并比较实用的方法。
A. 变化
B. 周移
C. 加减
D. 调整
The purpose of storm oil in a sea anchor is to().
A. weigh down the anchor
B. lubricate the anchor
C. repel dangerous fish
D. smooth the sea
低摩合成闸瓦磨耗剩余厚度不小于()。
A. 10mm
B. 14mm
C. 15mm
D. 20mm