题目内容

税率可以被分成哪几种类型?

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教学方法的本质含义和主要功能是什么?

进入汽缸的空气经过压缩行程后,其特性变化为()。

A. 压力和温度升高
B. 压力和温度降低
C. 压力升高,温度降低

The time of discharging oil is short, but oily water separator discharges oil frequentlyThe possible reason is ()

A. the sensor of low oil level is fully covered by sludge
B. the coarse strainer before the pump in suction system is clogged
C. the screw pump is worn seriously and volumetric efficiency is decreased
D. bilge suction value is clogged

汽车下坡起步,在一般平缓坡道起步,可按平路起步要领操作。坡道较陡时,可用()起步。

A. 一挡或二挡
B. 二挡或三挡
C. 三挡或四挡
D. 四挡或五挡

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