当油罐发生火灾后，燃烧时间不长，油品温度还不高的情况下，可采取“边冷却、边灭火”的方法扑救。
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Fires in escaping flammable gas are quickly brought under control by（）
A. stopping the flow of gas
B. reducing the chemical chain reaction
C. increasing the oxygen supply
D. cooling below the autoignition point
As a vessel changes course to starboard，the compass card in a magnetic compass（）.
A. remains aligned with compass north
B. also turns to starboard
C. first turns to starboard then counterclockwise to port
D. turns counterclockwise to port
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