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1、2024年衡水金卷先享题英语四
2、2024衡水金卷先享题分科综合卷英语二
3、2024衡水金卷分科综合卷英语
4、2024衡水金卷先享题全国卷二
5、2024衡水金卷先享题答案高三一轮英语
6、2023-2024衡水金卷先享题答案英语
7、衡水金卷先享题答案2024英语全国二卷
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9、衡水金卷先享题分科综合卷2024英语一答案
10、2024衡水金卷先享题答案英语二

是请f developing heartdieB Tooth loss.A Low diets.C Blood vessel breakdown0韩h慰s the best tithe of the textA.Brushing teeth keeps you healthy.B Poor dental heaith causes diseasesC Sugar diet results in poor oral health.D Visting dentists helps prevent heart disease31 What is the purpose of the last paragraph?CA To stress the importance of health.B.To tell us how to keep teeth for life.C To call on people to look after our teeth.D To show the harm of poor dental health0hether iky maths problem or an unexpected bill,daily life is full of stressful experiencesNoweers have found that humans producea different smell when under pressure and dogscnsouWhile previous studies have suggested dogs might pick up on human emotions,possibly through smel.mnedverwhether they coud detect stress and if this coudbe done through scent."This study has definitively proven that people,when they have a stress response,their smell profilechangessid Clar Wilson.a PhD student at Queen's University Belfast,and first author of the research.iadded the findings could prove useful when training service dogs,such as those that support people withpost-traumatic stress disorder(PTSD)(创伤后应激障得.Wilson and colleagues first constructed a stand bearing three containers,each topped by a lid with holesThey were able to train four dogs to identify the container holding a particular breath and sweat sample,evenwhen the other containers included unused cloth,samples from another person,or samples from the same persontaken at a different time of the day.Then the team turned to breath and sweat samples collected from 36 peoplemaasked to count backwards from 9,000 in units of 17.The participants reported feeling stressed by the task andfor the 27 who carried it out m the laboratory,their blood pressure and heart rate rose.The dogs were taught to pick out samples taken just after the task from a line-up that included twocontainers holding unused cloth.The researchers then tested whether the dogs could do the same when theine-up included not only unused cloth but samples taken from the same participant just before the task,wherthey were more relaxed.Each set of samples was shown to a single dog in 20 trials.The results reveal that the dogs chose the"stressed"sample in 675 out of the 720 trials.The team say whilwanclear what chemicals the dogs were picking up on,the study shows humans produce a different smelwhen stressed.3.What do we know about previous studies?DA They lef certain problems unsolved.vedwhy dogs identified human emotions第页共4