單項(xiàng)選擇題

The two main types of load cells used in mooring tension gauges are（）.

A.distortion and compression
B.hydraulic and mechanical
C.magnetic and applied torque
D.frictionless and hydraulic

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單項(xiàng)選擇題

The transmission of messages respecting the dangers specified is free（）cost to the ships concerned.

A.of
B.on
C.at
D.in

單項(xiàng)選擇題

The towing light is a(n)（）.

A.flashing amber light
B.yellow light with the same characteristics as the sternlight
C.all-round yellow light
D.yellow light with the same characteristics as the masthead light

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The two main types of load cells used in mooring tension gauges are（）.

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The transmission of messages respecting the dangers specified is free（）cost to the ships concerned.

The towing light is a(n)（）.