题海让大学四年没有难题
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单选题 Vessels shall be deemed in sight of one nother only when one from the other one.( )

A. can be observed visually

B. can be observed by radar

C. can be located on the radar

D. can be heardt

期末考试课程封面

学科:期末考试

时间:2023-07-04 14:49:48

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