Large quantities of information, as well as some timely help ________ since the organization was built.

A．has offered

B．had been offered

C．have been offered

D．is offered

意识的本质是( )。

A．意识是大脑的机能

B．意识是社会的产物

C．意识是自然界的产物

D．意识是人脑的机能，是客观存在的反映