计算大脑灌注压（CPP）参数包括（）。

A.动脉收缩压和颅内压

B.动脉舒张压和颅内压

C.平均动脉压和颅内压

D.脑血流量和脑血管阻力

E.脑血流量和颅内压

You _____ to town to see the film yesterday. It will be on TV tonight.

[      ]

A. didn't need to go

B. couldn't go

C. should not go

D. needn't have gone