下列属于Ⅲ类抗心律失常药的是（）
A.利多卡因
B.奎尼丁
C.普鲁卡因胺
D.普萘洛尔
E.盐酸胺碘酮
参考答案：E
---Must we leave the classroom now?
---No, you _____. You _____ leave after the bell rings.
A．mustn't; are allowed to
B．don't have to; might
C．needn't; can
D．can't; are supposed to
测量自来水管壁的厚度应选用的合适的测量工具是（ ）
A．米尺
B．三角尺
C．卷尺
D．游标卡尺
