诊断考虑为
A．室间隔缺损
B．房间隔缺损
C．主动脉导管未闭
D．病毒性心肌炎
E．法洛四联症
参考答案：B
用所给词的适当形式填空。
1. Christmas Day is on December _________________ (twenty-five).
2. Christmas is _________________ (come).
3. Xiao Shenyang is very _________________ (fun).
4. They are very _________________ (excite).
5. It's fun _________________ (put up) a Christmas tree.
将大米或豆瓣种在适宜条件下能否长出幼苗（ ）
A．大米能，豆瓣不能
B．豆瓣能，大米不能
C．大米和豆瓣都不能
D．大米和豆瓣都能
