局部通风机进风口前（）m范围内不得有杂物。
A、2
B、5
C、10
D、15
参考答案：B
--Is he still raising money for charity?
--Yes. He never hope of helping poor children.
A．gives up
B．gives out
C．takes off
D．takes out
紧急停炉应怎样进行？
