According to the latest reports on TV and in the newspaper, food safety is becoming a ____________ serious worldwide problem.

A．more and more

B．little by little

C．now and then

D．one by one

按照规律办事，体现了( )精神。

A．主观符合客观的

B．辩证唯物论

C．主观能动性

D．偶然性决定一切的