The film Not One Less, ______ on a real story, is very instructive and well worth seeing.

A．to base

B．be based

C．basing

D．based

肺气肿病人吸入麻醉诱导和吸入麻醉恢复均较正常人为慢，这是因为（）

A.过度通气通气

B.FRC增大影响了肺内原有气体的交换速度

C.胸廓呈膨胀状态

D.阻力升高

E.以上都不是