胚胎甲状舌管咽端遗迹为
A．舌盲孔
B．甲状腺峡部
C．舌体
D．舌根
E．舌背
参考答案：A
Li Lei often takes care of the old woman after school.
A．looks like
B．looks for
C．looks up
D．looks after
我国过渡时期的根本任务是______。
