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问题
填空题
心绞痛分型按国际习惯临床分类为：（）。
答案
参考答案：
稳定型心绞痛；不稳定型心绞痛及变异型心绞痛
填空题
看图完成句子。
1.
This is a _____________.
2.
These are _____________.
3.
They are young _____________.
4.
Theae are young _____________.
5.
Here are four _____________.
6.
This is _____________.
查看答案
单项选择题
国内普通邮件按性质分为（）和包件。
A.函件
B.包裹
C.信函
D.小包
查看答案
This is a _____________. 
These are _____________.
They are young _____________.
Theae are young _____________.
Here are four _____________.
This is _____________.