【正文】 od attracts germs。 germs produce acid, and acid hurts your teeth and gums. Flossing (使用牙線) helps to remove the food that gets stuck between your teeth. This explains why flossing helps to keep your mouth healthy, but some doctors say that flossing can also be good for your heart. It may seem strange that something you do for your teeth can have any effect on your heart. Doctors have e up with a few ideas about how flossing works to keep your heart healthy. One idea is that the germs that hurt your teeth can leave the mouth and travel into your that get into the blood can then attack your heart. Another idea is based on the fact that when there are too many germs in your mouth, the body tries to fight against there germs. For some reason, the way the body fights these mouth germs may end up weakening the heart overtime. Not every doctor agrees about these ideas. Some doctors think that the link between good flossing habits and good heart health is only a coincidence. The incidence (發(fā)生率) of two or more events is pletely random, as they do not admit of any reliable cause and effect relationship between them. For example, every time I wash my car, it rains. This does not mean that when I wash my car, I somehow change the weather. This is only a coincidence. Similarly, some doctors think that people who have bad flossing habits just happen to also have heart problems, and people who have good flossing habits just happen to have healthy hearts. The theory that flossing your teeth helps to keep your heart healthy might not be true. But every doctor agrees that flossing is a great way to keep your teeth healthy. So even if flossing does not help your heart, it is true to help your teeth. This is enough of a reason for everyone to floss their teeth every day.（1）From the passage, we know that ________.A.food stuck between your teeth may hurt your teethB.all of the doctors agree that flossing is good for your heartC.doctors39。 judgment about flossing is based on medical researchD.not every doctor thinks flossing helps to keep your teeth healthy（2）The underlined sentence in Paragraph 3 is to ________.A.provide an exampleB.make a parisonC.introduce a new topicD.develop the previous statement（3）Which of the following best states the main idea of the last paragraph?A.It is a fact that flossing can help your heart as well as your teeth.B.There is no good reason to believe that flossing will help your heart.C.Because doctors find flossing won39。t help your heart, it is useless to floss.D.Even if flossing is only good for your teeth, you should still do it every day.（4）Which is the best title for the passage?A.Flossing by CoincidenceB.How to Keep Your Teeth HealthyC.Flossing Habits and Healthy HeartsD.Why Doctors Disagree About Flossing【答案】 （1）A（2）D（3）D（4）C 【解析】【分析】本文提到經(jīng)過研究，剔牙與保持心臟之間沒有必然的聯(lián)系，但剔牙能保護(hù)牙齒的健康是可以肯定的。( 1 )推理判斷題。根據(jù)第一段提到It is bad to have food stuck between your teeth for long periods of time. This is because food attracts germs(細(xì)菌), germs produce acid, and acid hurts your teeth and gums.(長時間讓食物停留在牙齒是有害處的，這是因為食物能吸引細(xì)菌，細(xì)菌會產(chǎn)生酸，腐蝕你的牙齒)，故選A項。( 2 )句意猜測題。Not every doctor agrees about these ideas不是每個醫(yī)生都對這些問題持相同的態(tài)度，Some doctors think that the link between good flossing habits and good heart health is only a , some doctors think that people who have bad flossing habits just happen to also have heart problems一些醫(yī)生認(rèn)為有剔牙習(xí)慣的碰巧有心臟問題，故是發(fā)展以前的觀點，因此選D項。( 3 ) 段落大意題。根據(jù)最后一段提到剔牙能保持你的心臟健康這一理論可能并不正確的，但醫(yī)生同意剔牙能保證牙齒的健康，因此即使剔牙不能有助于你的心臟，肯定能保護(hù)你牙齒，這就是每天剔牙的重要原因，故選D項。( 4 )主旨標(biāo)題題。本文提到經(jīng)過研究，剔牙與保持心臟之間沒有必然的聯(lián)系，但剔牙能保護(hù)牙齒的健康是可以肯定的，故選C項。4．閱讀理解 Since 2013, Torobo, a robotic arm designed to test the limits of artificial intelligence, has had one ambition—to be admitted to the University of Tokyo. However, it has repeatedly failed. This year was no exception. In early November Torobo took an exam to prepare for an allimportant standardized test. While Torobo39。s total score of 525 out of 950 was 14 points higher than in 2015，its standard score of % was slightly lower, because human students did better in the 2016 test. Though the score，which is higher than the national average, is enough to get the robot admitted to many other famous Japanese universities,it falls short of the minimum required for the University of Tokyo. A closer analysis of the results showed that Torobo39。s newly programmed ability to solve plex physics problems helped increase itsyearoveryear physics score from 46. 5% to 59%. The robot also dug deep into its database of information from textbooks and websites to obtainan impressive % in world history. The average 60% scores acquired in the two math sections, were not too shabby either. But，while Torobo is able to handle knowledgebased questions and ones involving plex mathematical calculations, it has a hard time thinking independently. As a result, the robot is unable to fully understand multiple sentences and phrases to arrive at the logical conclusions required in the English language tests. This weakness was reflected in the weak oral and writing scores, which came in at % and %, respectively. Fortunately, after four tiring years, the robot39。s creators have decided to free Torobo from its annual testtaking suffering, the research team will instead focus on improving the robot39。s ability to pick out specific answers from massive sets of data—a skill that led to its excellent history scores. They believe the expertise(專業(yè)技術(shù)）will help Torobo succeed as an industrial robot. （1）What is the disadvantage of Torobo? A.It has much difficulty searching for facts.B.It doesn39。t own language skills.C.It has weak independent thinking ability.D.It couldn39。t get through the exams.（2）What does the underlined word “it” in the third paragraph refer to? A.the scoreB.ToroboC.the University of TokyoD.the national average（3）What did the exam results show?