如铁剂治疗有效,则网织红细胞的变化为
A.服用铁剂后立即升高B.2~3周后开始升高C.2~3周达高峰D.2~3周下降至正常E.4周之后回落至正常
参考答案:D
_______ the news of his father's death, he burst into tears.
A.After hearing
B.On hearing
C.While hearing
D.Having heard
婴儿患有神经系统疾病,结核病,传染病,皮肤病可以接种疫苗。