A:肝细胞膜上葡萄糖转运蛋白数量——血糖浓度
B:效应T细胞数量——靶细胞数量
C:胰高血糖素浓度——血糖浓度
D:性激素浓度——促性腺激素浓度
The trees are____tall for us____reach the apples on them.
⑴What did you do yesterday?____ A. I am going to play basketball.
⑵What are you going to do?____ B. I am playing football.
⑶What are you doing now? ____ C. I played pingpong.