Mr. Brown doesn’t feel at _______ease for the time being for _______ little money the present job     brings him can hardly support his extended family.

A．/; the

B．an; the

C．an; /

D．the; a

喉镜显露声门时，下列哪项错误（）

A.根据解剖标志循序推进喉镜

B.显露声门的操作要迅速准确，轻柔

C.麻醉转浅时应重新加深

D.将上门齿作为支点显露声门

E.上提喉镜显露声门