單項選擇題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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1.單項選擇題The anchor was then（）and the siren sounded.
A.aweigh
B.weight
C.weigh
D.weighing
2.單項選擇題Are there many（）and warehouses in the port?
A.wharf
B.wharves
C.wharve
D.wharfs
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