Nothing in my life has meant ____ to me as his praise.

A．as much

B．more

C．that much

D．as good

传染病流行过程的基本条件

A．病原体，人体和它们所处的环境

B．病原体，感菌动物，易感人群

C．传染源，传播途径，易感人群

D．传染源传播途径

E．社会环节，自然环节