is there a way to keep the britain’s economy growing?

　　1. （5）in today’s knowledge economy, nations survive on the things they do best. japanese design electronics while germens export engineering techniques. the french serve the best food and americans make computers.
　　2. britain specializes in the gift of talking. the nation doesn’t manufacture much of anything. but it has lawyers, stylists and business consultants who earn their living from talk, talk and more talk. the world foundation think tank says the uk’s four iconic jobs today are not scientists, engineers, teachers and nurses. instead, they’re hairdressers, celebrities, management consultants and managers. （6）but can all this talking keep the british economy going? the british government thinks it can.
　　3. although the country’s trade deficit was more than ￡ 60 billion in 2006, uk’s largest in the postwar period, officials say the country has nothing to worry about. in fact, britain does have a world-class pharmaceutical industry, and it still makes a small sum from selling arms abroad. it also trades services - accountancy, insurance, banking and advertising. the government believes britain is on the cutting edge of the knowledge economy. after all, the country of shakespeare and wordsworth has a literary tradition of which to be proud. rock‘n’ roll is an english language medium, and there are billions to be made by their cutting-edge bands. in other words, the creative economy has plenty of strength to carry the british economy.
　　4. however, creative industries account for only about 4 percent of uk’s exports of goods and services. （7）the industries are finding it hard to make a profit, according to a report of the national endowment for science, technology and the arts. the report shows only 38 percent of british companies were engaged in "innovation activities", 3 percentage points below the eu average and well below germany （61 percent） and sweden （47 percent）.
　　5. in fact, it might be better to call britain a "servant" economy - there are at least 4 million people "in service". the majority of the population are employed by the rich to cook, clean, and take care of their children. （8）many graduates are even doing menial jobs for which they do not need a degree. most employment growth has been, and will continue to be, at the low-skill end of the service sector - in shops, bars, hotels, domestic service and in nursing and care homes.
　　练习：
　　5. every country has its own way _______.
　　【答疑编号11030801】
　　答案：c
　　6. the british government doesn’t seem _______.
　　【答疑编号11030802】
　　答案：f
　　7. the creative industries find it difficult _______.
　　【答疑编号11030803】
　　答案：e
　　8. many graduates are employed _______.
　　【答疑编号11030804】
　　答案：b

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the tiniest electric motor in the world

　　1. scientists recently made public the tiniest electric motor ever built. you could stuff hundreds of them into the period at the end of this sentence. one day a similar engine might power a tiny mechanical doctor that would travel through your body to remove your disease.
　　2. the motor works by shuffling atoms between two molten metal droplets in a carbon nanotube. one droplet is even smaller than the other. （8）when a small electric current is applied to the droplets, atoms slowly get out of the larger droplet and join the smaller one. the small droplet grows - but never gets as big as the other droplet - and eventually bumps into the large droplet. as they touch, the large droplet rapidly sops up the atoms it had previously lost. this quick shift in energy produces a power stroke.
　　3.（6）the technique exploits the fact that surface tension -- the tendency of atoms or molecules to resist separating -- becomes more important at small scales. surface tension is the same thing that allows some insects to walk on water.
　　4. although the amount of energy produced is small -- 20 microwatts -- it is quite impressive in relation to the tiny scale of the motor. the whole setup is less than 200 nanometers on a side, or hundreds of times smaller than the width of a human hair. if it could be scaled up to the size of an automobile engine, it would be 100 million times more powerful than a toyota camry’s 225 horsepower v6 engine.
　　5. in 1988, professor richard muller and colleagues made the first operating micromotor, which was 100 microns across, or about the thickness of a human hair. in 2003, zettl’s group created the first nanoscale motor.（7） in 2006, they built a nanoconveyor, which moves tiny particles along like cars in a factory.
　　6. nanotechnology engineers try to mimic nature, building things atom-by-atom. among other things, nanomotors could be used in optical circuits to redirect light, a process called optical switching. （5） futurists envision a day when nanomachines, powered by nanomotors, travel inside your body to find disease and repair damaged cells.
　　练习：
　　5. doctors envision that the nanomotor would travel through human bodies to _______.
　　【答疑编号11030805】
　　答案：a
　　6. surface tension means the tendency of atoms or molecules to _______.
　　【答疑编号11030806】
　　答案：b
　　7. nanoconveyors could be used to _______.
　　【答疑编号11030807】
　　答案：f
　　8. applying a small electric current causes atoms to _______.
　　【答疑编号11030808】
　　答案：c

napping to a healthier heart?

　　researchers say they have developed a simple test that can tell if a person with heart disease is likely to suffer a heart attack. （5）the test measures levels of a protein in the blood. the researchers say people with high levels of this protein are at high risk of heart attack, heart failure or stroke.
　　kirsten bibbins-domingo of the university of california in san francisco led the team. for about four years, they studied almost one thousand patients with heart disease. （5）the researchers tested the heart disease patients for a protein called nt-probnp. patients with the highest levels were nearly eight times more likely than those with the lowest levels to have a heart attack, heart failure or stroke.
　　（6）the researchers say the presence of high levels of the protein in the blood shows that the heart muscle is under pressure in some way. the study involved mostly men, so the researchers could not say for sure that the results are also true for women. they say the patients with the highest levels of nt-probnp were older and had other problems like diabetes or high blood pressure.
　　other researchers say more studies are needed to confirm if knowing the protein levels of a heart patient should affect that person’s treatment. they also would like to know if more aggressive treatment could reduce the patient’s chance of a heart attack or stroke. the study appeared in the journal of the american medical association.
　　could a little sleep during the middle of the day reduce the risk of a heart attack? an unrelated study earlier this month in the archives of internal medicine suggests that the answer may be yes. （7）in countries like the united states, afternoon naps are mostly for children. but they are common for adults in mediterranean countries. and these countries generally have lower rates of heart disease. so scientists in the united states and greece wondered if naps could play a part. twenty-three thousand healthy adults took part in the study by harvard university and the university of athens.
　　those who took thirty-minute naps three times a week had a thirty-seven percent lower risk of death from heart problems than people who did not take naps. the researchers say napping may improve heart health by reducing stress. they say the research suggests that naps are especially good for working men. （8）but they say not enough female subjects died during the study to judge the benefits for women.
　　练习：
　　5. according to some researchers, by measuring the levels of nt-probnp in the blood people may know _______.
　　【答疑编号11030809】
　　答案：b
　　6. if a person has a high level of nt-probnp _______.
　　【答疑编号11030810】
　　答案：e
　　7. people who take regular afternoon naps _______.
　　【答疑编号11030811】
　　答案：c
　　8. so far there have not been definite data to confirm _______.
　　【答疑编号11030812】
　　答案：f

　　总结：
　　1.完成句子最重要的是回到文章定位
　　2.定位以后和选项进行对比