1993年10月21，金陵石化公司炼油厂油品分厂半成品车间无铅汽油罐区由于操作工误操作，造成了311号罐内汽油打入已经满罐但入口阀处于开启状态的310号罐，使该罐浮顶被顶破，汽油大量外冒、流淌、气化、扩散，油蒸气遇罐区公路上行驶的手扶拖拉机排气管火星爆炸燃烧，万吨油罐冒起了冲天大火，罐区多处起火，燃烧面积达两万多平方米，共造成2人死亡。已知汽油的爆炸温度下限-38℃，上限-8 ℃ ，请回答以下问题 ： （1）常温下处于封闭罐装的汽油是否具有爆炸危险性，并分析其原因？ （2）分析此案例中泄漏的汽油能够发生爆炸的原因。

e cmell the wy to Chin for lerning it better ______ for mking money.other thn B．more thn C．better thn D．rther thnA．other thanB．more thanC．better thanD．rather than

hild, sheMrs. Ball has a son. His name is Mick. She _ _1_ _ him very much and as he is not a __ 2 __ child, she is always _ _3_ _ that he may be ill, _ _4_ _ she takes him to see the best _ _5_ _ in the town four times a year and the doctor always looks him over_ _6__ . During one of these __ 7_ _, the doctor gives Mick all kinds of tests and then says to him, “Do you have any _ _8_ _ with your nose or ears these days ” Mick _ _9_ _ for a second and then answers, “Yes, I __ 10_ _.” Mrs. Ball is very _ _11_ _. “But I’m sure you don’t tell me about__12__, Mick!” She says worriedly. “Oh, really ” Says the doctor seriously（） B．nose C．mouth D．ear