题目

Here is your hat. Don't forget ________________ when you ______________. A . to put it on, leave B . to wear it, leave C . to wear it, will leave D . putting it on, will leave 答案：A下列说法正确的是A.自燃是由缓慢氧化引发的B.爆炸一定是由燃烧引发的C.剧烈燃烧必然导致爆炸D.缓慢氧化一定能引起自燃