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單項(xiàng)選擇題

Radar is not only to obtain（）,but also to measure their distance away from you.

A.brightness of obtain
B.color of targets
C.shape of targets
D.bearing of objects

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單項(xiàng)選擇題

The anchor was then（）and the siren sounded.

A.aweigh
B.weight
C.weigh
D.weighing

單項(xiàng)選擇題

Are there many（）and warehouses in the port?

A.wharf
B.wharves
C.wharve
D.wharfs

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