固体废物按其化学成分可分为（）。
A.固体废物和半固体废物
B.生活废物和工业废物
C.有机废物和无机废物
D.高热值和低热值废物
参考答案：C
用所给词的适当形式填空。
1. The lake is a very dangerous place for young children. Of course I don't allow anyone _____( swim). 2. We don't permit _____(play) basketball on the playground between six and ten in the morning.
3. Today the patients can have the doctor's _____(permit) to go home.
4. The teacher encouraged me _____( study) abroad.
补气兼养阴收涩宜选
A．黄芪B．人参C．山药D．甘草E．白术
