小儿处于生理性免疫低下状态的时期是()
A.新生儿期
B.婴幼儿期
C.学龄前期
D.学龄期
E.青春期
参考答案:B
You’d better_________ his name, address and telephone number in your notebook before you forget them.
A.pack up
B.care about
C.set up
D.set down
郑州:河南
A.苏州:杭州 B.唐山:河北C.山西:山东 D.南昌:江西