— Does Betty want to be an           ?

— Sorry, I don't know.[ ]

A. actress                    

B. policeman

C. waiter                    

D. milkman

以下药物中以其R构型的右旋体作为麻醉药的是（）

A.恩氟烷

B.盐酸氯胺酮

C.盐酸普鲁卡因

D.依托咪酯

E.盐酸利多卡因