可以产生较强镇痛作用的麻醉药是（）。

A.氯胺酮

B.异丙酚

C.依托咪酯

D.咪哒唑仑

E.硫喷妥钠

__________people relaxation and pleasure, but it can also increase their knowledge of any kind.

A．Not only can travel give

B．Not only can give travel

C．Not only travel can give

D．Not only travel gives