贮罐或钢瓶内石油汽受到高温或阳光曝晒引起爆炸属于（）爆炸。
A.化学
B.物理
C.物理化学（KHD：设备基本知识）
参考答案：B
My sister doesn't like bread. She won't eat it _____ she is very hungry. [ ]
A. if
B. when
C. as
D. unless
隔板主要由隔板体、喷嘴叶片、外缘三部分组成
