單項選擇題

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%

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單項選擇題

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

單項選擇題

THE ANCHOR WAS HEAVED AWEIGH means（）.

A.The anchor was weighted
B.The anchor was let go
C.The anchor was lost
D.The anchor was clear of the bottom