單項(xiàng)選擇題

The phrase “When built” in the Certificate of Vessel’s Nationality definitely means（）.

A.When was your vessel built
B.At what time is your vessel building
C.When is your vessel built
D.At what time you built your vessel

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單項(xiàng)選擇題

The expression THE AIR IS SATURATED means（）.

A.the relative humidity is 100%
B.the vapor pressure is at its minimum for the prevailing temperature
C.precipitation has commenced
D.cloud cover is 100%

單項(xiàng)選擇題

The broadcast will normally be made on the two listed frequencies simultaneously except during transmitter maintenance periods when the broadcast will be made on the two frequencies（）.

A.at the same time
B.exclusively
C.within the same period
D.consecutively