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
