分析 太重对你的健康有害,现在世界上变胖不仅成了大人的问题也成了小孩的问题.现在美国6岁以上的儿童大约有900万是胖子.
睡眠可能是变胖的原因之一,过去的研究已经表明了睡得少和胖得多的一种关系,但是科学家在决定哪个在前哪个在后上却是费了一番周折.
为了得到是哪个引起哪个的更好的观点,科学家采访了785个三年级学生的父母关于他们的孩子那年睡得怎样的情况.三年后父母们回答了同样的问题.
到了六年级时,这些孩子中的18%成了胖子.科学家们发现肥胖跟孩子的种族及性别无关,也跟父母的严厉与否无关.变胖只是这个群体等同的一个问题.
似乎相反,睡眠好像是主要的原因.对于六年级的孩子来说,平均每晚睡眠9.5小时,变胖的风险会降低20%.对于三年级的孩子来说睡眠好像更重要,三年级以前多睡一小时会降低40%的变胖风险.
解答 66.C 整篇短文谈论的是睡眠少会导致肥胖,故选C.
67.A 根据短文第三段To get a better idea of which cause which,scientists interviewed the parents of 785third grade students about how well their kids sleep that year.可知科学家采访了785个三个级学生的父母,故选A.
68.C 根据短文第四段The scientists found no relationship between weight and the students'race or sex.It also didn't matter how strict their parents were,or whether they were boys or girls.可知肥胖跟孩子的种族及性别无关,也跟父母的严厉与否无关,故选C.
69.B 根据短文第四段By sixth grade,18% of these kids were fat.可知到六年级时,这些孩子中的18%成了胖子,故选B.
70.A 根据短文末段For the six grade students,every night of sleep above the 9.5-hour average(平均) caused a 20% lower risk of being fat.Sleep appeared more important for the third grade students.可知睡眠对于三年级的孩子来说更重要,每晚不要少于9.5小时,故选A.
点评 本篇阅读涉及到主旨大意题,推理判断题及细节理解题,加强对文章的整体理解,理解文章主旨,进行正确地推理,还要注意细节的查找.
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