妊娠心烦常见分型不包括（）。
A.阴虚火旺
B.外感热邪
C.肝经郁火
D.痰火内蕴
E.以上均不是
参考答案：B
The place _____ the bridge is supposed to be built should be _____ the cross-river traffic is heaviest.
A．which; where
B．at which; which
C．at which; where
D．which; in which
前后都有缺隙的孤立前磨牙上最好设计为（）。
A.双臂卡环
B.三臂卡环
C.对半卡环
D.回力卡环
E.圈形卡环
