第一时间发四级考试仔细阅读答案

　　57)A) A persons hair may reveal where they have lunch

　　58)B) Food and drink leave traces in ones body tissues

　　59)D) The water it delivers becomes slighter when it moves inland

　　60)C) A map showing the regional differences of tap water

　　61)D) It helps police narrow down possibilities in detective work