2012年大学英语四级阅读冲刺题（04）_第2页

　　A) it suggested a way to keep some foods fresh without preservatives

　　B) it discovered tiny globules in both cream and butter中 华 考 试 网

　　C) it revealed the secret of how bacteria multiply in cream and butter

　　D) it found that cream and butter share the same chemical composition

　　37. According to the researchers, cream sours fast than butter because bacteria ________.

　　A) are more evenly distributed in cream

　　B) multiply more easily in cream than in butter

　　C) live on less fat in cream than in butter

　　D) produce less waste in cream than in butter

　　38. According to Brocklehurst, we can keep cream fresh by ________.

　　A) removing its fat

　　B) killing the bacteria

　　C) reducing its water content

　　D) altering its structure

　　39. The word “colonies” (Line 2, Para. 4) refers to ________.

　　A) tiny globules

　　B) watery regions

　　C) bacteria communities来自www.Examw.com

　　D) little compartments

　　40. Commercial application of the research finding will be possible if salad cream can be made resistant to bacterial attack ________.

　　A) by varying its chemical composition

　　B) by turning it into a solid lump

　　C) while keeping its structure unchanged

　　D) while retaining its liquid form

答案：36. A 37. B 38. D 39.C 40. D