燃烧炉灭火如何处理？
参考答案：
切断煤气，通知操作台，停制粉系统。
The opening province which _________ thirteen counties and three coastal cities will quicken its paces of economic development.
A．consists of
B．makes up
C．is included
D．is contained
A．光的干涉和衍射现象说明光具有波动性
B．光的频率越大，波长越大
C．光的波长越大，光子的能量越大
D．光在任何介质中的传播速度为3×108m/s
