单项选择题

To obtain accuracy in fixing by DF，（）and three stations should be used.

A.parallel bearings
B.long-range bearings
C.short-range bearings
D.cross bearings

<上一题 目录 下一题>
热门 试题

单项选择题
Vessels in port may use（）for receiving typhoon warnings during the typhoon season.

A.their transmitters
B.their receivers
C.their radars
D.their lorans
单项选择题
We’ll see（）the compasses are in good condition.

A.if
B.how
C.when
D.where
相关试题