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【判断题】
大面积切顶事故的主要原因是直接顶或基本顶的大面积运动造成的。()A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】All the _________ things need air and water. Without air or water, nothing can stay _______.
A.
living; living
B.
living; alive
C.
alive; alive
D.
alive; living
【简答题】Air is to man what fish to water.
【简答题】海蚀穴
【简答题】The water circle refers to the ______ of water from land to sea to air and back again.
【单选题】The purpose of an air compressor unloading device is to _____.
A.
drain water from the air receiver
B.
drain water from the cylinders
C.
delay the compression process until the motor is up to speed
D.
check pump alignment
参考解析：
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