Thispassageismainlyabout______A)thedefinitionofbac

This passage is mainly about ______.

A) the definition of bacteria

B) health germs

C) probiotics

D) probiotics versus antibiotics

正确答案：B
答案：B
[试题分析]文章主旨题
[详细解答]文章第一段的内容就已表明作者的话题是有益菌后文结合具体的临床运用更直观地层示了有益菌的功劳也就是说本文的所有内容显然是围绕healthgerms来展开的因此答案应为B