小儿扁桃体发育的高峰年龄段是（）
A.3～6个月
B.1～2岁
C.2～4岁
D.4～10岁
E.10～14岁
参考答案：D
--- She's never spoken to a foreigner, _______?
--- Yes. She is active and can speak English freely.
A． is she
B．has she
C．isn't she
D．hasn't she
提问：胃管长度的测量？为什么要胃管插进去45-55cm？
