有正常菌群的部位是()
A.胃、肠道、腹腔
B.鼻咽腔、脑脊液、眼结膜
C.胆囊、肝实质、十二指肠
D. * * 、口腔、胃
E.皮肤、黏膜、淋巴液
参考答案:D
He often goes to movies and plays sports instead of ______ at home.
A. stay B. staying C. to stay
找出单位“1”的量,并写出来:行了全程的60%.