黄疸的辨证，当以何为纲
A．阴阳
B．虚实
C．寒热
D．表里
参考答案：A
用所给词的适当形式填空。
1. I ____________ (go) hiking last Sunday.
2. I like ____________ (read) books.
3. Did you ____________ (play) basketball?
4. She ____________ (clean) the room yesterday.
5. They ____________ (cook) noodles together last week.
下列生态系统中恢复力稳定性最强的是（）
A.呼伦贝尔大草原
B.青海湖
C.人工蔬菜大棚
D.西双版纳雨林
