大学英语往年六级真题

1、大学英语往年六级真题大学英语往年六级真题：2018 年 英语六级听力Recording Here is baby niece Sarah. Mon is doctor her is alawyer. the time goes college, jobs her do going look dramatically different.In 2013, researchers at Oxford University did a study futureof work. concluded almost in every jobs a highrisk being automated mach

2、ines. Machine thetechnology responsible most this disruption. Its mostpowerful of artificial allows machines learnfrom and copy of things humans do. company, Kaggle, operates the cutting of machine learning.We bring together hundreds thousands experts solveimportant problems for industry academia. g

3、ives a uniqueperspective machines do, they cant what jobs might automate or threaten.Machine learning making its into industry the early90s. started with relatively simple It started with things assessing risk loan applications, sorting mail reading handwritten zip codes. the past years, have dramat

4、ic breakthroughs. Machine learning now capable far, more complex In 2012, Kaggle challenged its community build program could high-school essays. The winningprograms able match grades by human teachers.Now, given right machines going outperformhumans tasks this. teacher read 10,000 over 40-year care

5、er. machine read millions of essays within minutes.We have chance competing machines frequent, high-volume But there things can that machines do. machines made very little progress is tackling novel situations.Machines cant things havent seen times before.The fundamental limitations of machine learn

6、ing is it needs learn large volumes past But humans dont. have ability connect seemingly different threads solve problems weve never seen before.Question What the researchers at Oxford University conclude?Question What learn about Kaggle winning programs?Question What fundamental limitation machine

7、learning?Recording We talked recently the importance sustainableenergy. Weve talked about different theories on how canbe done. far, discussions all been theoretical. Now I apractical question for you all. you run one hundred fortythousand kilogram train on just steam generated solar Well, one engin

8、eer, councilman believes possible.And his city Sacramento, California should thetechnologies test part upgrading rail yard.Councilman, is inventor self-proclaimed steam visionary,is campaigning a steam that without fire andcould run an existing kilometer line, tourists perhaps offering city commuter

9、s green alternative to their cars.Councilman wants build array solar magnifying mirrors end the line collect focus onto filled tubes.This would generate steam that could used fill tanks small steam without use fire. Supplying trains this would the shortest distance from well wheels, he says,with lea

10、st amount energy according harry valentine, aCanadian engineer was researching modern steam technology, aspecial measuring ten meters store sevenhundred fifty kilowatt hours of energy high steamenough pull car train hour so. Energy drive steam locomotive be stored other materials besides water.For e

11、xample, team Tohoku University in japan studiedmaterials can store amounts heat. he did, materials turned from a solid a liquid, absorbing energy as change phase. liquid maintained its melting point steam required, which liquid allowed turn intoa solid, releasing its stored energy. Another team Nago

12、ya Universityin japan tested calcium compound as an energy material,heating chemical compound off carbon dioxide gas, leaving calcium The gas be stored pressure a to recover energy. gas bent over calcium oxide. theory, Valentine, can create high enough temperature to generate superheated Question Wh

13、at the speaker previously talked Question What Tim Councilman do Sacramento?Question What a Japanese research team tried do? Recording Todays crisis care older people England two causes. First, people are living longer a more complex Second, rely a system has long marked a poor relation between nati

14、onal health social services.Current services originated in key measures. are National Health and 1948 National Assistance Act. Thisrequired local provide residential accommodation older people supervise homes by independentorganizations. also home and community including meals, centers home helpers

15、other subsidizedservices. National Health was and wholly publiclyprovided. delivered best health for all. such visionguided residential community though. care substantially provided by voluntary which together local authorities they had with eligibility based on income.Today, expectancy risen 66 for

16、 male birth 1948 around now. addition, is better health improved medical knowledge in care. This an unprecedentednumber people surviving longer conditions requiring ex-birthsupport. provide least much care they did.Even they rarely without subsidized support address serious personal needs. Care for

17、older faced persistent criticism asthese trends apparent. the early nineteen localauthorities required plan and welfare services. The aimwas enable older people to remain their homes as longas possible. this increased concern about lack of coordinationbetween health paid social care. Through the nin

18、eteenseventies, number measures to improve However, time financial crisis, funding diminished littlechanged. 1980s, government spending. Meanwhile,preference private public services management evenmore difficult. Simultaneously, the number sick, people grew.Governments emphasized the need improve services. They did though, doing little the erosion available Services irregular authorities were preparedto pay. were increasingly obtain any the mostseverely disabled. Why has sixty of criticism so little change?Discrimination older people a long Additionally, those affected inadequate and soc