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【单选题】
下面关于制动助力器的描述错误的是?A.
制动助力器一般叫做真空制动助力器，制动助力器以气动方式将驾驶员通过制动踏板施加的作用力增大。
B.
助力器利用了发动机进气道内的真空来吸制动助力器内部的膜片，从而起到了给驾驶者的腿加了一把力的作用。
C.
在制动助力器输入端装有一个压杆。
D.
压杆操纵制动主缸内的两个活塞（分别用于两个制动回路）并由此在液压系统内产生压力。
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【单选题】When it comes to picking a pet, size matters. If __1__ , take that into account. It might seem like a bird wouldn't take up much room, but __2__ . Make sure you have plenty of space to house your new ...
A.
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【简答题】3. And if you take away people's ability to
use language in what should be a nonlinguistic task, their
performance can change dramatically, sometimes them look no
smarter than rats or...
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