单项选择题

Magnets in the binnacles of magnetic compasses are used to reduce the effect of（）.

A.deviation
B.variation
C.local attraction
D.All of the above

<上一题 目录 下一题>
热门 试题

单项选择题
It may be found that，in certain circumstances，Radar Beacon can cause unwanted interference particularly（）.

A.at close range
B.at end on situation
C.at head on situation
D.at crossing situation
单项选择题
It is dangerous for vessels without the use of radar（）the estuary.

A.to get
B.to approach
C.to proceed
D.to close
相关试题