单项选择题

A light is（）from Changshanzui,the SE extremity of the island.

A.exhibited
B.established
C.constructed
D.built

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单项选择题

Integrated Bridge and Navigation Systems(IBS INS) provide excellent performance and reliable navigation under all conditions by（）.

A.integrating well-proven, harmonizing equipment
B.integrating all equipment in the bridge
C.an intelligent platform with ECDIS and Radar
D.the control center based on ECDIS

单项选择题

The lowest point between two waves is called（）.

A.though
B.tough
C.through
D.trough