四级英语考试答案：仔细阅读

　　57 Interracial lodging may have diverse outcomes

　　58 Being surrounded by white peers motivates a black student to work harder to succeed

　　59 Roommates of different races just dont get along

　　60 The school randomly assings roommates without ragard to race

　　61 It is unscientific to make generalizations about it without further study

　　62 Rates fo death from illnesses have risen due to global warming

　　63 It was challenged by some climate and risk experts

　　64 It is invalid in terms of methodology

　　65 Its rough estimates are meant to draw the attention of world leaders

　　66 How rich countries can better help poor regions reduce climate hazards