锤骨头在胚胎发育中来自（）
A.赖歇特软骨
B.第一腮裂
C.第一腮沟
D.麦克尔软骨
E.第二腮弓
参考答案：D
The Kings have been to Tibet. They have decided to go there next year.
A．never
B．ever
C．already
D．yet
雄黄入药宜
A．先煎
B．煅用
C．后下
D．入丸、散
E．包煎
