停炉灭火嘴最快的方法是（）。
A、切断燃料气入口分支控制阀
B、切断燃料气的入口总手阀
C、关闭各火嘴燃料气手阀
D、切断燃料气的入口总电磁阀
参考答案：D
I haven't settled the problem of I'll go back home during the coming May Day.
A which B. what C. whether D. where
备注型字段在表中占用______个字节。
A．8
B．1
C．4
D．10
