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【单选题】
在DK-1型电空制动机中，作为列车分离保护的阀是（）。A.
分配阀
B.
电动放风阀
C.
紧急放风阀
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【简答题】Read the following paragraph. After the paragraph, some words or expressions are listed. Please find out the words or expressions of the same sematic field as those listed in the paragraph. Doctors ar...
【简答题】液压系统的压力取决于( )的大小。
【单选题】— Does it often rain here in summer? — Hardly ever ,____, the climate is like that of a desert. [ ]
A.
What's more
B.
In fact
C.
However
D.
Still
【单选题】-Does it often rain in Jinan? -No, was little rain in Jinan last winter.
A.
it
B.
this
C.
that
D.
there
【单选题】— ______________ it often rain in spring? — Yes, it ______________. [ ]
A.
Does; does
B.
Did; did
C.
Does; do
D.
Do; do
【单选题】Does it often rain there?
A.
In summer, it gets very hot.
B.
No, it isn't. It seldom snows here.
C.
Yes，it does, especially in summer.
D.
I like winter best.
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