可燃烧混合物的爆炸极限范围越宽，其爆炸危险越大。
参考答案：对
----Now that I’ve finished my exams, I’m going to relax and go to a movie tonight.
---- ______ I’ve still got two finals to take.
A．Good luck to you.
B．Lucky you!
C．So far, so good!
D．Mind your own business!
在一幅比例尺是1：10000000的地图上，量得北京与深圳之间的距离是26厘米．北京与深圳之间的实际距离大约______千米．
