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1、全国各地接二连三地发生了多起特大安全事故，造成严重的人员伤亡，特别是北京密云、吉林商厦等特大安全事故，引起了党中央和国务院的高度关注课时18阅读理解七选五(4)【典题演练】(2016四川卷)根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。Both men and women are living longer these days in industrialized countries._1_ In general, they can expect to live six or seven years more than men.One reason for
2、this is biological.One important biological factor that helps women live longer is the difference in hormones between men and women._2_ Between the ages of about 12 and 50，women produce hormones that are involved in fertility (生育能力)These hormones also have a positive effect on the heart and the bloo
3、d flow.In fact，women are less likely to have high blood pressure or to die from heart attacks._3_They help the body defend itself against some kinds of infections.This means that women generally get sick less often and less seriously than men.The common cold is a good example：women, on average，get f
4、ewer colds than men._4_Scientists are still not exactly sure how genes influence aging, but they believe that they do.Some think that a womans body cells have a tendency(倾向)to age more slowly than a mans. Others think that a mans body cells have a tendency to age more quickly._5_AHowever, women, on
5、average, live longer.BThe biological factor plays an important part.CWomen are also helped by their female genes.DThe female hormones also protect the body in another way.ERecent research seems to support both of these possibilities.FTherefore, women are more healthy than men and can live a better l
6、ife.GHormones are chemicals which are produced by the body to control various body functions.【能力提升】A根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。What to expect at high schoolAre you super worried about what to expect at high school? Well, guess what? Everyone is! The following tips will help guide you s
7、afely through your first day!Understand that youll be moving a lot. Depending on the school youre at, there could be more subjects and youll have more classrooms! _1_ Be ready to move around and remember what classrooms they are in. Understand the newness of high school. There are usually more stric
8、t teachers and more classrooms! Dont worry. _2_ More friends and more freedom (hopefully)! There will be a lot of differences, so go along with it and dont feel nervous about the change. _3_Stay away from students who have higher grades than you! Theyre older and you will be an easy target, so watch
9、 your back! If they do try to threaten you or anything, tell your parents or teachers to help you with it. Be prepared for the dining room. Make sure you have friends to sit with, or youll look lonely and feel lonely. Make some new friends to sit with. _4_Remember to stay good in school._5_ You dont
10、 need an “A” for everything, but an “F” on everything is not good! Spend enough time on study and take notes during class. AOne for every subject.BPut your books in order.CKnow who to watch out for. DThere are some advantages!ETry to eat healthily on your first day.FTry to make a good impression on
11、the teachers.GDo your homework and make sure you study hard!B根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。A strong memory depends on the health and vitality(活力) of your brain.They say that you cant teach an old dog new tricks, but when it comes to the brain, scientists have discovered that this old sayi
12、ng simply isnt true. _1_Give your brain a workout.Memory, like muscular strength, requires you to “use it or lose it”The more you work out your brain, the better youll be able to process and remember information. _2_Dont skip the physical exercise.While mental exercise is important for brain health,
13、 that doesnt mean you never need to break a sweat.Physical exercise helps your brain stay sharp.It increases oxygen to your brain and reduces the risk for disorders that lead to memory loss.Get enough sleep.There is a big difference between the amount of sleep you can get by on and the amount you ne
14、ed to function at your best. _3_Keep stress in check.Stress is one of the brains worst enemies.Over time, stress destroys brain cells.Studies have also linked stress to memory loss.Have a laugh._4_ That holds true for the brain and the memory, as well as the body.Unlike emotional responses, which ar
15、e limited to specific areas of the brain, laughter engages multiple regions across the whole brain._5_ Just as the body needs fuel, so does the brain.You probably already know that a diet based on fruits, vegetables, whole grains, “healthy” fats and lean protein will provide lots of health benefits,
16、 but such a diet can also improve memory.For brain health, though, its not just what you eatits also what you dont eat.AEat a brainboosting diet.BPlay games with memory.CLaughter is the best medicine.DBut oversleeping is not good for your brain.EEven skipping a few hours makes a difference!FYou have to shake thin
