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【判断题】
当列车运行中遇有落石、倒树等障碍物危及行车，司机应立即停车，排除障碍并确认安全无误后，继续运行。A.
正确
B.
错误
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】连续型火警探测器按感温环线的构成和原理分为()感温环线、()感温环线和()感温环线。
【单选题】We met the old man ______ times on the way home.
A.
dozen of
B.
dozen
C.
dozens
D.
dozens of
【单选题】From the passage we know______.
A.
the old man once smoked more than one cigar a day
B.
the old man once smoked one cigar a day
C.
the old man didn't smoke before he went to see the doctor
【单选题】RBC Corporation currently has a negative contribution margin. Which of the following statements is true?
A.
It can break even by increasing its sales volume.
B.
It can achieve a positive operating profit by reducing its fixed costs.
C.
It can improve profits by decreasing its variable cost per unit.
D.
It can improve profits by decreasing its selling price.
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