-When did you become a volunteer for the

证券投资基金的营销渠道有直销和代销两类渠道。( )

—Sorry, sir. I made a mistake again.

—________ Practice more and you will do better. [ ]

A. Never mind.

B. I'm not sure.

C. You're welcome.

D. Don't mention it.

反应原料事故返塔，返入（）

A、分馏塔

B、汽提塔

C、吸收塔

在我国，全国人民代表大会和地方各级人民代表大会的选举经费来源于( )。

A．国库

B．政治募捐

C．社会赞助

D．候选人出资

如何选用低压断路器？