5、hempaymoreattentiontothepronunciations.Tellthemtodoexercisesintheexercisebook.AnswerReadCarefullyreadthenewwordsandexpressionsTakenotes.Readtheeverywordcorrectly.重点单词检测:1 n 系统;体系;制度2______________ n.大气层;气氛3_____________ prep.不同;不像4_____________n.链子;连锁;锁5_____________vi.&