问题
单项选择题
某公司职工146人于4月初春游,在餐馆用中餐。深夜,有16人在各自家中突发腹痛、腹泻、恶心、呕吐,怀疑发病与中餐有关 进一步追查有114人在两天内先后有症状。收集到110人饮食与发病史,结果如下:
进食与发病有关的食物的归因危险度为()。
A.77%
B.87%
C.67%
D.57%
E.97%
答案
参考答案:A
某公司职工146人于4月初春游,在餐馆用中餐。深夜,有16人在各自家中突发腹痛、腹泻、恶心、呕吐,怀疑发病与中餐有关 进一步追查有114人在两天内先后有症状。收集到110人饮食与发病史,结果如下:
进食与发病有关的食物的归因危险度为()。
A.77%
B.87%
C.67%
D.57%
E.97%
参考答案:A
Could the Internet be totally free and should it be? Should the Internet be regulated? The recent disorder in the Arab world ____ by a disputed (有争议的) video damaging the image of Prophet (先知) Muhammad shows the United States, which is busy ____ global Internet freedom, has paid a huge price ____ the lives of its diplomats. In an unregulated Internet world, cheating, violence or rumors can ____ serious consequences. Many countries across the world are periodically suffering from “rumors” ____ by the Internet and social media. The US-led West always promotes Internet freedom and ____ any regulation as investigation, but it should think twice if it calculates the heavy price that has been and has to be paid for “____”. Moreover, ____ the Internet in the West ____ to be free, with no obvious ____ and no limited sites, isn’t the structure of the main pages already hand-controlled, with selected press agencies and ____ occupying clearly dominating (显著的) positions? The Internet has helped fight injustice, ____ corruption in places so far apart as Indonesia, India and Latin America. But the Internet could be extremely ____ as well. Various racist or separatist organizations are using their Internet sites to fan ____. Those who are spreading hate are frequently using the Internet as their tool. No country can ____ to make the Internet absolutely free. The question is how to keep free flow of information ____ while protecting children from unhealthy works, common citizens from ____ rumors and countries from unfair and damaging propaganda (宣传) attacks. And who sets the limits? The ____ is that there will never be a perfect system. Every country will have to ____ its own system, based on its culture, social ____ and the degree of danger it’s facing.
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