题目内容:
This passage is mainly about ______.
A) the definition of bacteria
B) health germs
C) probiotics
D) probiotics versus antibiotics
参考答案:【答案仅供学习,请勿对照自行用药等】
This passage is mainly about ______.
A) the definition of bacteria
B) health germs
C) probiotics
D) probiotics versus antibiotics