Alice stood in front of the window,____ she could watch her classmates playing football.

A．which

B．from where

C．from there

D．there

血液的组成是[ ]

A．血浆、血小板　　　　

B．红细胞、白细胞、血小板

C．血浆、血细胞　　　　

D．血浆蛋白、葡萄糖、氨基酸、水