The oil pressure and flow from each bearings can be checked when .

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A.the lubricating pumps are stopped and the access doors are opened

B.the lubricating pumps are running and the access doors are opened

C.the engine is running and the access doors are closed

D.the engine is stopped and the access doors are closed

请帮忙给出正确答案和分析,谢谢!

热搜:做二进制逻辑运算:(xB2XORx57)AND(x96ORNOT(x7D)),