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【单选题】
列车制动机为一次缓解型，J2-7型空气制动机客货车转换阀手柄置于客车位时，当制动管有漏泄，或白阀置于常用制动区后误将手把在制动区移动时，会使列车制动机 发生（）。
A.
自然制动
B.
自然缓解
C.
无法缓解
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【简答题】Soon, the ____ started and the young athletes left Cliff far behind. The ____ smiled, and some laughed out loud because he didn't even run properly. He had the strangest running style; he appeared to ...
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【多选题】Soon, the marathon started and the young__1___ left Cliff far behind. The crowds__2___, and some laughed out loud because he didn't even run properly. He had the strangest running style; he appeared t...
A.
athletes
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smiles
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【单选题】If he had come a little early, he the bus.
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would catch
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would have caught
C.
would have catch
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have caught
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【多选题】Why did some people laugh at Cliff Young when he was running?
A.
Because Cliff Young didn’t run properly.
B.
Because Cliff Young had the strangest running style.
C.
Because Cliff Young appeared to shuffle.
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A.
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B.
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C.
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【简答题】According to Cliff Young himself, what made him run throughout the race?(Para. 8)
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【单选题】He had so little education he was unfit for this job.
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【简答题】7 Soon, the marathon started and the young athletes left Cliff far behind . The crowds smiled, and some laughed out loud because he didn’t even run properly. He had the strangest running style ; he ap...
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