2. It is well known that China's great achievements in economic and social development over the past 30 years cannot be _____ its continuous efforts to push for rural reforms.

A．separated from

B．separated between

C．divided into

D．divided between

有机物的存在会影响消毒效果，原因不包括（）。

A、有机物可能与消毒剂发生反应

B、有机物可作为屏障阻挡消毒剂对病原体的作用

C、上述二原因均有

D、有机物可促进病原体的增殖