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【单选题】
Telescopic pipes to the piston of a large slow-speed main propulsion diesel engine are designed to prevent _____.A.
excessive crankcase pressure
B.
excessive lube oil temperature
C.
contamination of the lube oil by water
D.
contamination of the cooling water by lube oil
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举一反三
【单选题】He is expected to ______ the business after his father retires.
A.
took up
B.
took down
C.
took over
D.
took control
【判断题】湿式除尘技术的机理主要包含有惯性捕集、直接拦截、扩散以及其它作用等四个过程，一般来讲，通过惯性捕集过程而实现降尘所对应的粉尘颗粒粒径要小于通过扩散过程实现粉尘捕集时所对应的粉尘颗粒粒径。
A.
正确
B.
错误
【单选题】MHC限制性表现在 ( ) A、Mφ的吞噬作用 B、ADCC作用 C、Tc细胞识别靶细胞抗原的过程 D、B细胞识别TI抗原的过程 E、补体依赖的细胞毒作用
A.
B.
C.
D.
E.
E
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