填空题 Translate the following English passage into Chinese．(对外经济贸易大学2010研，考试科目：基础英语)The economist Alan Krueger, author of a new book called "What Makes a Terrorist?" explores this phenomenon with a systematic study of the evidence. He concludes that terrorists, political extremists and those who commit hate crimes are often relatively well-to-do.This is a difficult thing to prove, not least because each of those categories is controversial and there is a world of difference between, say, Northern Ireland and Sri Lanka, Krueger dips into different sources of data, each one imperfect, trying to build up a compelling picture from opinion polls, biographies of terrorists and broader studies.Opinion polls from Gaza and the West Bank, conducted last week show that students and professionals are more likely than the unemployed or laborers to say that terrorism can be justified, and more likely to deny that a suicide bombing in a Tel Aviv night club should be described as "a terrorist act".When a graduate student at Princeton, the young economist Claude Berrebi gathered data on more than 40 Palestinian suicide bombers: he concluded that they were far better educated than the typical Palestinian, and also richer. Krueger offers a complementary picture using biographies of 129 fighters killed in action, although not necessarily while attempting a terrorist attack. They, too, were somewhat better educated and less likely to be poor than the typical young Lebanese man of the time.All in all, the research that Krueger gathers together suggests that if there is a link between poverty, education and terrorism, it is the opposite of the one popularly assumed. We should not be surprised to find that terrorists can add up, read, and even write prescriptions.