我国北方地区和南方地区以____ 为分界线，它也是我国亚热带常绿阔叶林和温带____ 的分界线．
下列属于消化道传染病的是（ ）
—I often have hamburgers for lunch.
—You'd better not. It's bad for you _________ too much junk food.
_________ your parents _________ bananas?
