同等学力考试英语样卷三及答案解析Part Ill Reading Comprehension(45 minutes
25 points)Section A Directions: In this section , there are four passages followed by questions or unfinished statements,each with four suggested answers A,B.C and D.Choose the best answer and mark your answer on the Answer Sheet.Passage One Childhood exposure to a group of chemicals , which are used widely in a variety of products , including water-resistant clothing and microwave popcorn , could reduce the effectiveness of common vaccines,a new study has found. Researchers at the Harvard School of Public Health in Boston looked at over 580 children and found that those who had higher concentrations of these perfluorinated( 全 氟 化 的 ) compounds(PFCs)in their blood had lower immune responses to diphtheria(白喉)and tetanus(破伤风) vaccinat