Na+从细胞内出来
A.单纯扩散B.易化扩散C.主动转运D.入胞作用E.继发性主动转运
参考答案:C
Do you skate______?
A. a lot quite B. a quite lot C. quite a lot
—How many _____ have you got?
—I've got many. [ ]
A. photoes
B. photo
C. photos
D. a photo