汽车追逐的惊险场面,经常出现在好莱坞的电影里,其结果常常是相撞起火,或坠下悬崖爆炸。但是,事实并非如此,汽车的油箱并不是那么容易起火爆炸的。汽油是一种碳氢化合物等组成的复杂混合剂,碳氢化合物能燃烧。石油被开采出来时,含有许多不同的碳氢化合物分子:有的是含数百个碳 The thrilling scenes pursued by cars often appear in Hollywood movies. The result is often a collision or a cliff explosion. However, this is not the case. The fuel tank of a car is not so easy to catch fire and explode. Gasoline is a complex mixture of hydrocarbons, etc. Hydrocarbons can burn. When oil is extracted, it contains many different hydrocarbon molecules: some contain hundreds of carbon