可燃气体挥发与空气混合，达到一定浓度可被火星点燃的温度叫（）。
参考答案：闪点
I was born in New Orleans，Louisiana，a city ________ name will create a picture of beautiful trees and green grass in our mind.
A．which
B．of which
C．that
D．whose
青绿饲料
