单项选择题

At the master gyrocompass，the compass card is attached to the（）.

A.spider element
B.sensitive element
C.link arm
D.pickup transformer

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单项选择题
At sea，we can use（）to fix the ship’s position.

A.VHF
B.Steering Gear
C.Rudder Indicator
D.Loran
单项选择题
Assumption shall（）on the basis of scanty information especially scanty radar information.

A.make
B.be made
C.not make
D.not be made
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