题目内容:
Questionsarebasedonthepassageyouhavejustheard.
A.Bacteriaprefercolderareatowarmerarea.
B.Thewarmerenvironmentismoresuitableforthegrowthofbacteria.
C.Peoplebecomeweakerintheirimmunesystem.
D.Animalswillcarrythebacteriawhentheymigrate.
参考答案:
答案解析: