969The example of SARS is used to illustrate that__________. 1008

The example of SARS is used to illustrate that__________. 查看材料 A.much remains to be done in improving the public health system B.the sooner the cases of infectious diseases are reported the better C.WHO is an indispensable organization D.Internet plays a very important role in fighting against infectious 请帮忙给出正确答案和分析，谢谢！