多巴胺在体内消除主要是：
A．促进外周组织摄取葡萄糖
B．原形自尿排出
C．在肝中被代谢
D．神经末梢再摄取
E．被MAO和COMT代谢
参考答案：E
To have a dinner at a restaurant on the Eve of the Spring Festival, you need to reserve the
restaurant months before, _____? [ ]
A. mustn't you
B. didn't you
C. don't you
D. needn't you
目前爪镶法比较流行（）、方齿形和半圆形。
A.三角形
B.尖齿形
C.圆形
D.随形
