对运输企业而言,中间商就是众多的或代运代理机构。()
参考答案:对
This is of no practical ________ at present, but such a prospect is not impossible.[ ]
A. quantity
B. significance
C. character
D. fashion
多台焊机在一起集中施焊时,焊接平台或焊件必须接地,并应有隔光板。