治疗脾肾阳虚型腹泻的首选组方是（） A.大肠俞、天枢、足三里、太白 B.肝俞、太冲、

侵入第一中间宿主阶段（）

A.童虫

B.虫卵

C.毛蚴

D.尾蚴

E.囊蚴

色织与化纤长丝混纺平纹棉布

We ________the difficulty together, but why didn't you tell me? [ ]

A. should face  

B. might face

C. could have faced  

D. must have faced

重叠作用