下列关于镇静安定药的叙述不恰当的是（）

A.分苯二氮类和丁酰苯类

B.巴比妥类中枢抑制效应与剂量相关

C.地西泮有麻醉作用

D.很少有中枢抑制

E.常用作术前药

What kind of scene might be shown in a typical regionalist painting

A．People working in a large factory.

B．People walking on crowded city streets.

C．An everyday activity in a small town.

D．A well-known historical event.