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问题
判断题
人力推车,1次只准推一辆车,可以在矿车两侧推车。
答案
参考答案:错
选择题
Do let your mother know all the truth. She appears ________ everything.
A. to tell
B. to be told
C. to be telling
D. to have been told
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判断题
进行气体置换时要注意保证脱氢进料换热器热侧压力不小于冷侧压力。
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