Studies have shown that our most _____ scientists produce not only some of the best ideas,

but also _____ bad ones. [ ]

A. respected; a great many of

B. respectable; a great deal of

C. respected; a great deal of

D. respected; a great many

氧化亚氮对循环系统的作用是（）

A.降低肺血管阻力

B.与阿片类合用增加心输出量

C.与异氟烷合用增加血压

D.有α-肾上腺素能作用

E.对循环有明显的剂量相关的抑制