试述世界油气勘探发展的阶段性及各阶段采用的主要勘探技术?
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当某种股票的预期收益率等于国库券的收益率时,那么其系数是()。
A. 大于1
B. 1
C. 在0~1之间
D. 0
CV67“肯尼迪”号的母港设在美国东海岸佛罗里达州的海波特海军基地。
A. 正确
B. 错误
采煤机甲烷传感器的断电范围为工作面及其回风巷内全部非本质安全型电气设备。
A. 正确
B. 错误
Your vessel is listening 4°to port and has a short rolling period. There is loose firefighting water in the hull. The ship is trimmed down by th end with one foot of freeboard at the bow. Which action should you take first?()
A. Press up the slack No.1 starboard double bottom tank
B. Pump out the forepeak tank
C. Eliminate the water in the tween decks aft
D. Jettision stores out of the paint locker in the focsle