动态式炉窑砌筑必须在炉窑单机( )验收合格后方可进行。
A．无负荷试运转
B．无负荷联动试运转
C．负荷试运转
D．负荷联动试运转
参考答案：A
The traffic rules say drivers mustn’t drive if they are drunk, _______they will be punished.[ ]
A. or
B. but
C. and
D. so
投资谈判
