当发生火灾等突发事件时，第一发现人正确的处置方法是（）。
A.先灭火，后报警
B.先报警，后灭火
C.边报警，边灭火
D.报警
参考答案：B
.________, I have never seen anyone who’s as capable as John.
A．As long as I have traveled
B．Now that I have traveled too much
C．Much as I have traveled
D．As I have traveled too much
在对结焦较厚的焦层进行清焦作业时，清焦器的清焦方向应（），以免将冲击头卡住。
A、从后向前推进
B、从前向后退
C、从前向左
D、从后向右
