小儿患小细胞贫血是由于缺乏（）
A.铁
B.钙
C.锌
D.碘
E.镁
参考答案：A
口服维生素D治疗活动期佝偻病何时改为预防量口服
A．半年后改预防量
B．5个月后改预防量
C．3个月后改预防量
D．2个月后改预防量
E．1个月后改预防量
— The weather has been very hot and dry.
— Yes. If it had rained even a drop, things would be much better now! And my vegetables ________. [ ]
A. wouldn't die
B. didn't die
C. hadn't died
D. wouldn't have died
