伸缩带式输送机在井下安装机身时,首先将H形架每()一架卧放在输送机中心线底板上,底脚朝向机头。
A.1m
B.2m
C.3m
D.4m
参考答案:C
The problem referred to at the meeting, if___________in time , will have a bad effect on the environment.
A.not being dealt with
B.not dealing with
C.not dealt with
D.not to deal with
圆内最长的线段是( )
A.半径
B.直径
C.任意一条线段
D.无法确定