单项选择题
A stream of water immediately surrounding a moving vessel’s hull，flowing in the same direction as the vessel is known as（）.
A.directional current
B.forward current
C.propeller current
D.wake current
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相关考题
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单项选择题
欧阳修是（）词人。
A.豪放派
B.边塞派
C.田园派
D.婉约派 -
单项选择题
Leaking oil seals on a diesel engine turbocharger can cause（）
A.the engine to run after the fuel has been secured
B.the engine to over-speed
C.a fire
D.all of the above -
判断题
浓度越高，药物的作用越强，故用95%的乙醇消毒，效果更好。
