题目内容

静液压力梯度受液体密度、含盐浓度、溶解气体的浓度以及温度梯度的影响。()

A. 正确
B. 错误

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Should any case or suspected case of quarantinable disease,or any case of eruptive disease or any death be discovered,the local Quarantine Officer must be()immediately.

A. noted
B. noticed
C. notified
D. notificated

During the fuel injection period, fuel pressure must exceed cylinder gas pressure to ().

A. ensure penetration and distribution of the fuel in the combustion chamber
B. ensure the needle valve is flushed clean during each injection
C. prevent combustion gas blowback into the open needle valve
D. prevent reflected pressure waves when the needle valve close

国际货币基金组织编制的国际收支平衡表标准内容由()、资本和金融账户构成。

当带轮孔加大时必须镶套,套与轴用键连接,套与带轮长用加骑缝螺钉方法固定。

A. 正确
B. 错误

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