大型燃气表应设在不小于150mm高的支墩上,与设备的水平距离要求如下:与灶具边缘大于()mm。
A.100
B.300
C.800
D.1000
参考答案:C
—What has happened to you.Jim?
— . I cut myself shaving this moming.
A.It's nothing
B.No idea
C.No problem
D.Forget it
()和氯、次氯酸盐等化合会发生燃烧和爆炸
A.氮气
B.氢气
C.乙炔