In a motor vessel, the air quantity which the engine room need is_______ of the requirements of the engines.
A. less than 25-50%
B. more than 125-150%
C. more than 25-50%
D. less than 125-150%
查看答案
In what units are heights and soundings in the chart？ They are in ______.
A. meters and fathoms
B. fathoms and meters
C. meter and fathom
D. fathom and meter
以下说法中正确的是______。
A. 凸轮机构是将从动件的连续或间歇的往复运动转换成凸轮的连续转动
B. 凸轮机构是将从动件的连续或间歇的往复运动转换成凸轮的间歇转动
C. 凸轮机构是将凸轮的连续转动转换成从动件的连续或间歇的往复运动
D. 凸轮机构是将凸轮的间歇转动转换成从动件的连续或间歇的往复运动
微信支付 
支付宝支付