根据所给文章,回答文件中11个问题,答案写在答题栏里。 I. Answer the following questions Q1: Why does Bill Gates mention the nuclear war at the beginning of the speech? Q2: What does Bill Gates think is the greatest risk of global catastrophe, and why? Q3: What could we have taken from the survivors to protect other people? Q4: Why does Bill Gates talk about Hollywood? Q5: How many reasons are there why Ebola didn’t spread more? What are they? Q6: What made the Spanish Flu in 1918 a serious problem? Q7: What tools do we have to help build a really good response system? Q8: According to Bill Gates, what are the key missing pieces in dealing with an epidemic? Q9: According to the World Bank, what might be the consequences caused by a worldwide flu epidemic? Q10: According to Bill Gates, what is the only positive side of Ebola epidemic? Q11: What is the main idea of the passage?