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1、课时作业(三十九).阅读理解Weighing too much can damage your health，and obesity is a growing problem for both kids and adults around the world.Sleep might be one answer to the problem.A new study has found that elementary school students who slept too little were more likely to gain pounds.Past studies have show
2、n a link between sleeping less and weighing more，but scientists have had a tough time determining“which_came_first，the_chicken_or_the_egg，”says Julie CLumeng of the University of Michigan in Ann Arbor.In other words，it hasnt been clear whether kids who weigh too much have trouble sleeping，or whether
3、 sleeping less leads to weight gain.Both scenarios(可能出现的情况) seemed equally possible.To get a better idea of which causes which，Lumeng and her colleagues interviewed the parents of 785 third graders from around the United States.The parents answered questions about how well their kids slept that year
4、.Three years later，the parents answered the same questions.By sixth grade,18 percent of kids involved in the study were obese.The scientists found no relationship between weight and the students race or gender.It also didnt matter how strict their parents were，or whether they were boys or girls.Obes
5、ity struck all of these groups equally.Instead，sleep seemed to be the key factor.Over the 3 years of the study，the children averaged a healthy 9.5 hours of sleep a night.Some kids，however，slept a lot moreor lessthan others.For the sixth graders，every hour of sleep above the 9.5hour averagewas linked
6、 to a 20 percent lower risk of being obese.Sleep appeared doubly important for the third graders.Every extra hour of sleep they got was linked to a 40 percent drop in obesity.1What does the underlined sentence in Paragraph 2 imply?AScientists have found the exact causes of childrens obesity.BThere i
7、s always something difficult to understand through theory.CThe causeeffect relationship between weight and sleep isnt clear.DA persons weight has something to do with the amount of his sleep.2What did the interview find out?A9.5 hours of sleep a night is enough for children.BThe more a child sleeps，
8、the healthier he will be.CSix graders need much more sleep than third graders.DOnes race or gender has nothing to do with his weight.3How does the author develop the passage?ABy listing figures.BBy comparing different opinions.CBy providing examples.DBy conducting a survey.4What is the suitable titl
9、e for the passage?AThe benefits of enough sleep for childrenBSleeping less increases the risk of obesityCWhich comes first，little sleep or obesity?DHow many hours of sleep do children need?答案：解题导语本文是说明文。一项新的研究发现，睡眠过少的小学生更容易发胖。1C解析：句意理解题。画线句表示的字面意思是“先有鸡还是先有蛋”，结合上下文的内容可知，文章引用这句话是为了表明“是睡眠少导致了肥胖还是肥胖导致了睡
10、眠变少”这个问题还没有定论。下文的“In other words, it hasnt been clear whether kids who weigh too much have trouble sleeping, or whether sleeping less leads to weight gain. Both scenarios(可能出现的情况) seemed equally possible”是解题的关键提示信息。2D解析：细节理解题。根据第四段中的“The scientists found no relationship between weight and the studen
11、ts race or gender”可知选D项。3A解析：写作手法题。文章主要介绍了一项研究，并列举了很多同该研究相关的数据，故选A项。4B解析：标题判断题。根据文章内容尤其是第一段中的“A new study has found that elementary school students who slept too little were more likely to gain pounds”可知，本文主要介绍了一项新的研究发现，睡眠少会增加肥胖的概率。故B项作文章标题最佳。.阅读填空2017安徽合肥二检Everybody knows the importance of drinking
12、 enough water.As we all know，drinking water benefits your skin，muscles and organs._1_The main reason for that is related to human biological needs.When youre a baby，youre 75 percent water.Then，as the years get higher，you get drier._2_ It helps you lose weight，according to a study from the University
13、 of Birmingham.The researchers found that drinking 500ml of water thirty minutes before a meal helped participants lose 10 more pounds than those who did not._3_ All participants were advised to improve their diet and physical activity levels.84 overweight adults were involved.Among them 41 were tol
14、d to “preload” with water，while 43 were told to control their water intake before eating.After 12 weeks，the participants instructed to “preload” with water lost 2.87 pounds more than those in the control group on average.In addition，the participants preloading with water before each of their three m
15、ain meals every day lost 9.48 pounds over the 12 weeks._4_Dr.Helen Parretti，a lecturer at the University of Birmingham，had this to say of the study：_5_ Just drinking 500ml of water，three times a day，before your main meals may help reduce your weight.and this could be an easy way for weight loss.Furt
16、hermore，it can be significant for an individual to lose extra weight，making a potential contribution to public health.AAnother reason to drink water is right here.BThe study began with a weight management consultation.CThe beauty of these findings is that losing weight is simple.DBut not everyone can get access to tap water in some areas.EIt
