生态系统一般包括___________、_________、________和________四个组成部分。
非生物成分 生产者 消费者 分解者
用适当的关系代词that, which, who, whom, whose填空
1. Here comes the girl _____ pronunciation is the best in our class.
2. Those are the things _____ I lost in the street yesterday.
3. He is the doctor _____ we often talk about.
4. She missed the things and persons _____ she loved.
5. We may go to our own library to look up any information _____ we need.
闭经的治疗原则,哪一项是正确的()
A.理气活血祛瘀
B.虚者补而通之,实者泻而通之,虚实夹杂者当补中有通,攻中有养
C.益气养血调经
D.补肾养肝、养血调经
E.温经散寒、活血祛瘀