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【单选题】
汽车的制动协调时间,对液压制动的汽车不应大于 ,对气压制动的汽车不应大于 。A.
0.35 s 0.60 s
B.
0.40 s 0.60 s
C.
0.45 s 0.80 s
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【简答题】“Avoid the rush hour” must be the slogan of large cities all over the world. Wherever you look, there are people, people, people. The trains which leave or arrive every few minutes are packed. The str...
【单选题】The torrential rain __________ all the chalk pictures on the pavements being washed away.
A.
has caused
B.
has stemmed from
C.
has the aim to
D.
has resulted in
【单选题】---All the pavements are wet. --- Yes, didn't you know? _____ for the last twenty minutes.( New Aim1-8)
A.
It's raining.
B.
It was raining.
C.
It's been raining.
D.
It has rained.
【单选题】---All the pavements(人行道) are wet. ---Yes, didn't you know? _________ for the last twenty minutes.
A.
It's raining
B.
It was raining
C.
It's been raining
D.
It has rained
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