锅炉垂直运输操作方法：在路面上垫上道木和滚杠，用绞磨拖或用撬_爱下问搜题

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问题判断题

锅炉垂直运输操作方法：在路面上垫上道木和滚杠，用绞磨拖或用撬棍以人力向前撬动，锅炉随着滚杠在道木上滚动，随时倒滚杠和道木。( )

答案

参考答案：错

选择题

—I still remember my wonderful stay there ________ I worked in the distant mountain village.
—But everything is changing so fast, the persons there aren’t the ones ______they used to be.

B．where; whom

C．during which; who

D．which; what

问答题简答题

加药泵启动后压力表无指示或不上药的原因及处理？