—Which do you prefer, a bottle of orange or a bottle of milk?              

—_____, thanks. I'd like just a cup of tea.                                                             [ ]

A. Either

B. Neither

C. Both

D. None

左右心室认别的根据是（）

A.房室瓣数目和开放的形态

B.房室瓣的位置

C.心室内膜面粗糙或光滑

D. * * 肌数目

E.以上都是