單項(xiàng)選擇題

As it approaches，a typical warm front will bring（）.

A.rising temperatures and falling barometric pressure
B.falling temperature and pressure
C.falling temperatures and rising pressure
D.rising barometric pressure and temperatures

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單項(xiàng)選擇題

As defined in the regulations governing marine casualties a “marine employer” may be the（）.

A.owner
B.agent
C.Master
D.All of the above

單項(xiàng)選擇題

As compared to carbon dioxide，dry chemical has which advantage?（）

A.Cleaner
B.Effective on metal fires
C.Greater range
D.More cooling effect

As it approaches，a typical warm front will bring（）.

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As defined in the regulations governing marine casualties a “marine employer” may be the（）.

As compared to carbon dioxide，dry chemical has which advantage?（）

As compared to carbon dioxide，dry chemical has which advantage?（）