Study the words in the box and choose the right words in blank. container inexpensive relax dormitory 1. _ your muscles before starting to run. 2. _ buildings might house a small number of students or many hundreds. 3. It is a relatively _ and renewable material that's readily available. 4. A _ is a very large metal box used for transporting goods.

Model____ (现在是教育工作者和家庭重新思考……的时候了) how to change the extent to which we expose our children to social media.→It's high time that educators and families rethought how to change the extent to which we expose our children to social media.1/____ (这条路也该修好了). They have been working on it for months.请输入答案…

Questions8to11arebasedontheconversationyouhavejustheard. 答案填写大写ABCD8A.It represents New York.B.It's next to the Central Park.C.Film stars sometimes go there.D.Getting a table there needs luck.9A.Driving a car.B.Riding a bike.C.Walking around.D.Jogging and exercising.10A.She has been there for many years.B.She has made lots of friends there.C.She likes the living conditions here.D.She can feel the intimacy with neighbors.11A.The side street vendors.B.The commercial atmosphere.C.The musical performances.D.The bright lights at night.

【题文】 Children under age 6 should try their best not to use cellphones or computers, the National Health Commission has said, in a bid to protect them from nearsightedness. The commission also advised against parents using electronics before their children. The advice came when the commission recently made public the results of a survey on nearsightedness among children and youths. The survey found that 53. 6% of Chinese children and teenagers had suffered from nearsightedness in 2018. The nearsightedness rate was 14. 5% for 6-year-olds in kindergarten, 36% for primary school students, 71. 6% for junior middle school students, and 81% for senior high school students. The commission said age 0-6 is a serious time to develop the ability of seeing, and special importance should be put on the protection and health of eyesight at an early stage. It added that the most important cause of nearsightedness is that children spend too much time watching cellphones, computers and televisions. At primary and middle schools, teaching with electronics should be controlled to no more than 30% of overall teaching time. After classes, students should take a rest of 10 minutes after using electronic products for learning for 30-40 minutes. Children shouldn't spend more than one hour a day using electronic products for fun. In addition, the commission made suggestions on outdoor exercise. It said children and teenagers should control the continuous use of eyes in reading and writing to no more than 40 minutes and leave enough time for outdoor activities in the daytime. Teachers and parents should guide children to actively take part in exercise, with around two hours of outdoor activities in the daytime. China made a plan last year to stop the rise in nearsightedness among children and teenagers. It wants to keep the nearsightedness rate among 6-year-olds at around 3% by 2030, and the rate among junior and senior high school students below 60% and 70%.【小题1】What does the underlined word "electronics" refer to? A．Cellphones and computers. B．Letters and cellphones C．Computers and magazines. D．newspapers and computers 【小题2】Students in________ have the highest percentage of nearsightedness. A．kindergarten B．primary school C．junior high school D．senior high school 【小题3】Which of the following is the most important cause of kids' nearsightedness? A．Kids spend too much time on their homework. B．Kids spend too little time doing eye exercises C．Kids spend much time on electronic products D．Kids spend too little time doing outdoor exercise 【小题4】The main idea of Paragraph 4 may be that________. A．it's very bad for kids to use electronic products B．children should use electronic products properly C．children should use electronic products in class D．it's difficult for kids to use electronic products

25) Without urgent action,the __ in the next two months may spread to the entire southern region,and even-|||-the whole country.-|||-○A.famine-|||-B.defect-|||-。 C.deficiency-|||-D.coincidence

The magazine Reader s Digest is famous for making complicated subjects_9_to millions of readers.

Think or Swim: Can We Hold Back the Oceans As the world gets warmer, sea levels are rising. It has been happening at a snail’s pace so far, but as it speeds up more and more low-lying coastal land will be lost. At risk are many of the world’s cities and huge areas of fertile farmland. The sea is set to rise a metre or more by the end of this century. And that’s just the start. "Unless there is a rapid and dramatic about-face in emissions-which no one expects-the next century will be far worse than this century," says glaciologist (冰川学家) Bob Bindshadler of NASA’s Goddard Space Flight Center, Maryland. Throwing trillions of dollars at the problem could probably save big cities such as New York and London, but the task of defending all low-lying coastal areas and islands seems hopeless. Or is it Could we find a way to slow the accelerating glaciers, drain seas into deserts or add more ice to the great ice caps of Greenland and Antarctica These ideas might sound crazy but we have got ourselves into such a bad situation that maybe we should start to consider them. If we carry on as we are, sea levels will rise for millennia, probably by well over 10 metres. Slashing greenhouse gas emissions would slow the rise, but the longer we hesitate, the bigger the rise we will be committed to. Even if "conventional" geo-engineering schemes for cooling the planet were put in place and worked as planned, they would have little effect on sea level over the next century unless combined with drastic emissions cuts. In short, if coastal dwellers don’t want their children and grandchildren to have to abandon land to the sea, now is the time to start coming up with Plan C. So New Scientist set out in search of the handful of researchers who have begun to think about specific ways to hold back the waters. One of the reasons why the great ice sheets of Greenland and Antartica are already shrinking is that the ice is draining off the land faster. Ice floating on the surrounding seas usually acts as a brake, holding back glaciers on land, so as this ice is lost the glaciers flow faster. The acceleration of the Jakobshavn glacier in Greenland is thought to be the result of warm currents melting the floating tongue of the glacier. Other outlet glaciers are being attacked in a similar way. Mike MacCracken of the Climate Institute in Washington DC is one of those starting to think that we shouldn’t just sit back and let warm currents melt ice shelves. "Is there some way of doing something to stop that flow, or cool the water" he asks. Last year, physicist Russel Seitz at Harvard University suggested that the planet could be cooled by using fleets of customised boats to generate large numbers of tiny bubbles. This would whiten the surface of the oceans and so reflect more sunlight. MacCracken says the bubbles might be better arranged in a more focused way, to cool the currents that are undermining the Jakobshavn glacier and others like it. A couple of degrees of chill would take this water down to freezing point, rendering it harmless. "At least that would slow the pace of change," MacCracken says. What about a more direct approach: building a physical barrier to halt a glacier’s flow into the sea by brute force Bindshadler thinks that is a non-starter. "The ice discharge has many sources, mostly remote and in environments where barriers are not Likely to work," he says. "Taking just the one example I know best, the Pine Island glacier in Antarctica drains into an ice shelf that at its front is 25 kilometres across and 500 metres thick, and moves at over 10 metres per day. The seabed there is 1000 metres down and is made of sediment (沉淀物) hundreds of metres thick and the consistency of toothpaste." Not your ideal building site. A slightly more subtle scheme to rein in the glaciers was proposed more than 20 years ago by Douglas MacAyeal of the University of Chicago. His idea is to fight ice with ice. The big outlet glaciers feed into giant floating shelves of ice, which break off into icebergs at their outer edges. MacAyeal suggested pumping water up from beneath the ice and depositing it on the upper surface, where it would freeze to form a thick ridge, weighing down the floating ice shelf. Add enough ice in this way, and the bottom of the ice shelf would eventually be forced down onto the seabed. Friction with the seabed would slow down the shelf’s movement, which in turn would hold back the glaciers feeding into it. It would be like tightening an immense valve. "I think it’s quite an inspired idea," says Bindshadler. But nobody has followed it up to work out how practical the scheme would be. "On the back of an envelope it has promise-but these ice shelves are big. You would need a lot of drilling equipment all over the ice shelf, and my intuition is that if you look at the energetics of it, it won’t work," Bindshadler says. Even if we could apply brakes to glaciers, this would only slow down sea level rise. Could we do better than that and reverse it-actually make the sea retreat If you think of the sea as a giant bathtub, then the most obvious way to lower its level is to take out the plug. "One of the oldest notions is filling depressions on the land," says MacCracken. Among the largest of these is the Qattara depression in northern Egypt, wlrich at its lowest point is more than 130 metres below sea level. Various schemes have been proposed to channel water from the Mediterranean into the depression to generate hydroelectric (水力) power, and as a by-product a few thousand cubic kilometres of the sea would be drained away. Unfortunately, that’s only enough to shave about 3 millimetres off sea level: a drop in the ocean. And there would be grave consequences for the local environment. "The leakage of salt water through fracture systems would add salt to aquifers (含水层) for good," says Farouk El-Baz, a geologist at Boston University who has studied the region. Refilling the Dead Sea is no better. Because of surrounding hills, this depression could be filled to 60 metres above sea level, but even that would only offset the rise by 5 millimetres-and drown several towns into the bargain. The notion of engineering lower sea levels remains a highly abstract topic. "If the world doesn’t control emissions, I’m pretty sure that no geo-engineering solution will work-and it would potentially create other side effects and false promises," says MacCracken. "But if we do get on a path to curbing emissions dramatically-down 50 per cent by 2050, say-then the question becomes, can geoengineering help with the hump we’re going to go through over the next few centuriesDouglas MacAyeal advised to pump water up from beneath the ice to______ A. break down the glaciers B. fight ice with iceC. tighten an immense valve D. weigh down the floating ice shelf

Passage Two-|||-Questions 51 to 55 are based on the following passage.-|||-Is science infinite?Can it keep giving us profound insights into the world forever? Or is it already bumping-|||-into limits? In his 2011 book The Beginning of Infinity physicist David Deutsch made the case for-|||-boundlessness.When I asked him about consciousness,he re think nothing worth understanding will-|||-always remain a mystery.And consciousness apems a understanding."-|||-At a meeting I just attended in Switzerland,"The Mystery of Human Consciousness,"anot famous-|||-British physicist,Martin Rees,challenged Deutsch`s optimism.In that essay Rees calls The Beginning of-|||-Infinity"provocative and excellent but disputes Deutsch`s central claim that science is boundless.Science-|||-will hit the buffers(缓冲区)at some point,"Rees warns.-|||-There are two reasons why this might happen. The optimistic one is that we clean up and understand-|||-certain areas (such as atomic physics)to the point that there`s no more to say.A second,more worrying-|||-possibility is that we`ll reach the limits of what our brains can grasp. There might be concepts,crucial to a full-|||-understanding of physical reality.Efforts to understand very complex systems,such as our own brains,might-|||-well be the first to hit such limits. Perhaps complex collectives of at whether brains or electronic-|||-machines,can never know all there is to know about themselves.-|||-The riddle of consciousness is a synecdoche for the riddle of humanity.What are we,really?For most of-|||-our history,religion has given us the answer.We are immortal souls,striving to reach heaven.Most modern-|||-scientists reject these religious explanations,bu they cannot agree on an alternative.They have proposed a-|||-bewildering variety of answers to the question of what we really are.-|||-Science will never resolv these disagreements and c on a single, true theory of what we are,for-|||-two reasons. One is that we will never have a"consciousness meter,"an objective means of measuring-|||-consciousness in non-huma things. The other is that we are too varying,too creative, to be captured by a-|||-single theory. Science itself keeps transforming with technologies as dive as brain implants,genetic-|||-therapy and ideas as diverse as queer theory and integrated information th To be human means to be a-|||-work in progress.-|||-Deutsch`s claim that science is infinite also has a contradiction at its core.He wants science to solve the-|||-deepest mysteries, like consciousness,and yet to have more mysteries to solve,forever.That is a radical-|||-assertion about the structure of nature,which to my mind reflects wishful thinking rather than hardheaded-|||-realism.-|||-Deutsch is both wrong and right.He is wrong that science can solve every mystery,and especially-|||-consciousness.We will never understand,once and for all,who we are.But Deutsch is right that science is-|||-potentially infinite, if infinite means -ending is precisely because we can never achieve total self-|||-knowledge that we will keep seeking it forever.-|||-51.Which of the following statements may David Deutsch agree with?-|||-A)The case study of physics should be unlimited.-|||-B)The scientific mysteries are worth understanding.-|||-C)The puzzle of consciousness will be worked out.-|||-D)Science will finally hit a bottleneck somewhere.-|||-52.The real reason for science to"hit the buffers"may be that __ _.-|||-A)science will inevitably experience its bottleneck period-|||-B)the cognitive ability of humanity cannot be boundless-|||-C)people are overoptimist about the development of science-|||-D)complicated systems are unable to be fully understood-|||-53.According to the author,the riddle of consciousness __ --|||-A)has been properly worked out by religious theories-|||-B)is made more perplexed by modern science-|||-C)will be solved in science`s debate again religion-|||-D)is the utmost challenge of human understanding-|||-54.What does the author mean by saying"To be human means to be a work in progress." (IIees5-6,Para,5)?-|||-A)Human consciousness is hard to be measured.-|||-B)Human consciousness is fo advancing.-|||-C)Humanity is working hard to make progress.-|||-D)Humanity is always changi developing.-|||-55.What does the author think of Deutsch`s point of view?-|||-B)Completely irrational. D)Quite encouraging.-|||-A)Partially acceptable. C)Somewhat groundless.