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D34.What conclusion did Dr.Zimmermann drawWhat are the best ways to reduce screen time?New research offersfrom the experiment?some suggestions.A.Young people are deeply dependent onAs many consumers look to reduce screen time,Apple and Googlehave released applications that try to help smartphone users do that.To seesmartphoneswhether such products really make a difference,two researchers designed理解B.Too much screen time does harm to our解a study that looked at the effectiveness of such strategies."Everyone hasmental health.easy access to features,what we call strategies,to help manage their ownGoing to black and white reduces users'screen time.But there was a lack of evidence on the effectiveness of thesescreen timefeatures,"says Michael Sobolev,author of the study at Cornell Tech.TheD.Self-control plays a crucial role in reducingstudys isLarai,an assistant profes at Madrid-based IE Business School.screen time.eThe two researchers designed a randomized field study in which 112iPhone users were divided into three groups,each of which was instructed35.Which can be a suitable title for the text?to activate the Screen Time app on their phones.The app monitors phoneusage and can be used to set screen-time limits or breaks.阅A.The psychology behind smartphone addiction读In the first group,participants weren't asked to do anything specificA simple trick to reduce your screen timeC.The pros and cons of using smartphoneswith the Screen Time app other than to monitor their phone usageThey were also instructed to put their smartphones in grayscale mode,a理D.The impact of smartphones解feature that changes the phone display to black and white from color.Theresearchers believed that a less-stimulating screen would make for a less-rewarding user experience.Members of the second group were asked toset time limits for themselves by using both the“downtime'”and“applimits"features of the Screen Time app.With"downtime"users set asidetime where only calls and certain apps can be used;"app limits"putstime limits on certain apps or categories,such as social media.Lastly.第二节阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。选项中有两项为多余选项。those in the control group were asked only to monitor their phone usageAll participants completed a subjective well-being survey measuring lifeOral health isn't one of the most exciting self-care practices,but it'ssatisfaction,stress,sleep and happiness before and after the experiment.an important one.G36 So brushing your teeth every day is a win for yourThe activation of grayscale mode immediately reduced users'screen读overall health.Now experts say there's one more way to look after yourtime compared with the control group.Those who were asked to set timeteeth and gums(牙龈)：rinsing(漱口)your mouth with water after you eat理解limits showed a more gradual reduction in screen time.This group'sA.Will it make your teeth clean?average reduction in screen time was not significantly lower than that of theB.This could lead to poor gum health over time.control group.Dr.Zimmermann says it surprised her how effective the use解C.Is it safe to brush your teeth after every meal instead?of grayscale was at reducing screen time,especially since "it was in theirD.However,mealtime can make your mouth more acidic.own hands to what extent they implemented the tools."E.So go to the bathroom as soon as you take your last biteF.Use a commercially available mouthwash unless you just enjoy thetaste.G.What's going on in your mouth is a strong indicator of your overallwell-being.As we know,pH is the level of acidic and basic compounds in the32.What was the primary purpose of the study?body,with 0 being the most acidic,7 being neutral and 14 being the mostbasic.Ideally,your mouth should remain at a neutral or basic pH.D37阅A.To compare the latest features ofIn an acidic environment or an environment below pH 4.5,the enamelsmartphones.(牙釉质)of the teeth will start to break down.When you rinse your mouthB.To determine the impact of smartphone use读with water,you're offering the teeth and gums a less acidic environment.38E理on well-being.理A.Will it make your teeth clean?C.To find out how people try to reduce theirB.This could lead to poor gum health over time.screen time in daily life.C.Is it safe to brush your teeth after every meal instead?To investigate the effectiveness of someD.However,mealtime can make your mouth more acidicE.So go to the bathroom as soon as you take your last bitefeatures for reducing screen time.F.Use a commercially available mouthwash unless you just enjoy thetaste.G.What's going on in your mouth is a strong indicator of your overallgwell-being.Will mouthwashes (work instead?Well,this practice doesn't33.What can we learn about the experiment?replace rinsing with water.Most of the time mouthwashes are acidic andtherefore aren't good for the surface of the enamel.Many mouthwashesThe first group put their smartphones incontain alcohol,an ingredient that dries out the soft tissue that lines the读grayscale mode.读walls of your inner mouth.B39 Thus,if you must purchase a mouthwash,B.The second group was asked to monitor theirphone usage.choose an alcohol-free optionA.Will it make your teeth clean?解C.The Screen Time app was used to set breaks解B.This could lead to poor gum health over time.for all participants.C.Is it safe to brush your teeth after every meal instead?D.However,mealtime can make your mouth more acidicD.The control group was instructed to set timeE.So go to the bathroom as soon as you take your last bite.limits for their phone usage.F.Use a commercially available mouthwash unless you just enjoy thetaste.G.What's going on in your mouth is a strong indicator of your overallwell-being.6
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