下列属于的发育阶段之一的是（）
A.尖牙
B.组牙
C.开
D.替牙
E.正中
参考答案：D
—Does your friend like salad?
— _________. [ ]
A. Yes, she like.
B. No, she does.
C. Yes, she doesn't
D. No, she doesn't.
严重的慢性汞中毒震颤特征是
A．意向性震颤
B．阵发性震颤
C．对称性震颤
D．静止性震颤
E．癔病性震颤
