题目

— Isn't that Ann's husband over there? — No, it ________ be him — I'm sure he doesn't wear glasses. A . must not B . can't C . won't D . may not 答案：B选择下列描述物质的词语填空：可燃性、吸附性、导电性、导热性。 （1）木炭生火    ；             （2）活性炭脱去红糖的颜色制白糖    ； （3）碳纤维制导线    ；         （4）石墨制坩埚   ；