未知题型 Are two heads usually better than one? If you had a difficult problem tosolve, would you be better working on the problem alone or working on it as S1.______part of a group? Years of research has yielded a consistent pattern of findingsshows that groups typically produce more, and produce better solutions to S2.______problems than the same number as individuals working alone. For instance, a S3.______classic experiment by Shaw had groups or individual subjects attempted to S4.______solve problems involving conceptual and mathematical skill. In every case, S5.______the groups produced more correct solutions than the individuals.However, it was one important warning to the finding of group superiority: S6.______the groups were considerably less efficient, when time considered, than the S7.______individuals were. In other words, although groups produced more correct solutions,but they did so at a cost of more time. In fact, much subsequent S8.______research has suggested that the advantage of groups in solving problems can beoutweighed unless efficiency in terms of time per person is a major criterion. S9.______

未知题型 Questions 38-40Complete each of the following statements with the best ending from the box below.Write the appropriate letters A-G in boxes 38-40 on your answer sheetIt has been established that social tension increases significantly in the United States during ______.

未知题型 听力原文： In its most extreme form, poverty is a lack of basic human needs, such as adequate and nutritious food, clothing, housing, clean water, and health services./Extreme poverty can cause terrible suffering and death,/and even poverty can prevent people from realizing many of their desires./The world' s poorest people--many of whom live in developing areas of Africa, Asia, Latin America, and Eastern Europe--struggle daily for food, shelter, and other necessities./They often suffer from severe malnutrition, infectious disease outbreaks, famine, and war./In wealthier countries--such as the United States, Canada, Japan, and those in Western Europe-- the effects of poverty may include poor nutrition, mental illness, drug dependence, crime, and high rates of disease./Extreme poverty, which threatens people' s health or lives, is also known as destitution or absolute poverty./Relative poverty is the condition of having fewer resources or less income than others within a society or country, or compared to worldwide averages./(1)