适用于固体物含量高的水提液的粗分离的方法为( )
A．沉降分离法B．离心分离法C．吸附澄清法D．超滤法E．滤过分离法
参考答案：A
----Little Daniel is watering the flowers! Why?
-----Well, I’m not feeling very well today—otherwise I it myself.
A．did
B．would do
C．have done
D．will have done
供电企业和用户应当根据什么签订《供用电合同》？
