2015年职称英语考试理工类A级补全短文精选练习题(5)
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　　There is a common response to America among foreign writers: the US is a
land of extremes where the best of things are just as easily found as the worst.
This is a cliché (陈词滥调).　　In the land of black and white, people should not be too surprised to find
some of the biggest gaps between the rich and the poor in the world. But the
American Dream offers a way out to everyone.__(46)__ No class system or
government stands in the way.　　Sadly, this old argument is no longer true. Over the past few decades there
has been a fundamental shift in the structure of the American economy.　　The gap between the rich and the poor has widened and widened. __(47)__　　Over the past 25 years the median US family income has gone up 18 per cent.
For the top 1 per cent, however, it has gone up 200 per cent. Twenty-five years
ago the top fifth of Americans had an average income 6.7 times that of the
bottom fifth.__(48)__.　　Inequalities have grown worse in different regions. In California, incomes
for lower class families have fallen by 4 per cent since 1969. __(49)___. This
has led to an economy hugely in favor of a small group of very rich Americans.
The wealthiest 1 per cent of households now control a third of the national
wealth. There are now 37 million Americans living in poverty. At 12.7 per cent
of the population, it is the highest percentage in the developed world.　　Yet the tax burden on America’s rich is falling, not growing.__(50)__ There
was an economic theory holding that the rich spending more would benefit
everyone as a whole. But clearly that theory has not worked in reality.　　A Nobody is poor in the US.(肯定不是答案， 句意太绝对)　　B The top 0.01 percent of households has seen its tax bite fall by a full
25 percentage points since 1980.　　C For upper class families they have risen 41 per cent.　　D Now it is 9.8 times.　　E As it does so, the possibility to cross that gap gets smaller and
smaller.　　F All one has to do is to work hard and climb the ladder towards the
top.　　46.F 47.E.　48.D.　50.B.当前位置： >>
>> 2015年职称英语理工A补全短文真题答案及解析
　　Gorillas have a word for it
　　Kokois the first gorilla to have been taught sign language (a way of communicatingby using hands and fingers rather than speech). With a vocabulary of more than1000 words, she is the first to prove we share a world with other intelligentbeings who feel emotions, look forward to celebrations and also have a sense ofhumour.
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2017年职称英语考试宝典VIP特训保过版(卫生类A级)[职称英语真题]2015年考试真题及参考答案详解――理工类A级真题及答案详解(一)
来源:91考试网
作者:www.91exam.org
2015年职称英语考试真题――理工类A级试题及答案
第一部分：词汇选项
1.I will not tolerate that sort of behavior in my class.
C.regulate
2.She showed a natural aptitude hard to accept.
3.Most people find rejection hard to accept.
4. The organization was bold enough to face the press.
B.powerful
D.sensible
5.They were locked in mortal cmbat.
6. We were attracted by the lure of quick money.
7.The procedures were perceived as complex and less transparent.
B.necessary
8.The Stock Exchange is in turmoil following a huge wave of selling.
C.disorder
9.He believes that Europe must change or it will perish.
10.There was a simultaneous trial taking place in the next build.
C.coexisting
11.They promote simulation of ethnic group into the main-streasm culture.
C.equality
D.intergration
12.A saleman’s cardinal rule is to satisfy customers.
A.principal
13.I must compliment you on your handling of a very difficult situation.
14.We live for years in a perpetual state of fear.
C.terribile
D.Contimuous
15.The starving children were a pathectic sight.
B.unexpected
C.unforgettable
第二部分：阅读判断
Lackof Oxygen Delayed the Rise of Animals on Earth
Scientistshave long speculated as to why animal species didn't flourishsooner,oncesufficient oxygen covered the Earth's surface.Animals began toprosper at theend of the Proterozoic period,about 800 million years ago ― butwhat about thebillion-year stretch before that,when most researchers think therealso wasplenty of oxygen?
Well,it seems the air wasn't so great then,after all.
Ina study published Oct.31 in Science,Yale researcher Noah Planavsky andhiscolleagues found that oxygen levels during the "boring billion"periodwereonly 0.1% of what they are today.In other words,Earth's atmospherecouldn'thave supported a diversity of creatures,no matter what geneticadvancementswere poised to occur.
"There is no questionthat genetic and ecological innovation must ultimatelybe behind the rise ofanimals,but it is equally unavoidable that animals need acertain level ofoxygen,"said Planavsky,co-lead author of the research along withChristopherReinhard of the Georgia Institute of Technology."We're providing thefirstevidence that oxygen levels were low enough during this period topotentiallyprevent the rise of animals.”
Thescientists found their evidence by analyzing chromium (Cr) isotopes inancientsediments from China,Australia,Canada,and the United States.Chromiumisfound in the Earth's continental crust,and chromium oxidation isdirectlylinked to the presence of free oxygen in the atmosphere.
Specifically,the team studied samples deposited in shallow,iron-rich oceanareas,near theshore.They compared their data with other samples taken fromyounger localesknown to have higher levels of oxygen.
Oxygen'srole in controlling the first appearance of animals has long vexedscientists."We were missing the right approach until now,"Planavskysaid."Chromium gaveus the proxy."Previous estimates put the oxygen level at 40%of today'sconditions during pre-animal times,leaving open the possibility thatoxygenwas already plentiful enough to support animal life.
Inthe new study,the researchers acknowledged that oxygen levels were"highlydynamic"in the early atmosphere,with the potential for occasionalspikes.However,they said,"It seems clear that there is a first-order differenceinthe nature of Earth surface Cr cycling"before and after the rise ofanimals.
"If we are right,ourresults will really change how people view the origins ofanimals and othercomplex life,and their relationships to the co-evolvingenvironment,"saidco-author Tim Lyons of the University ofCalifornia-Riverside."This could be agame changer.”
Fundingsources for the research included the NASA Exobiology Program and theNationalScience Foundation's Earth-Life Transitions program,awarded toPlanavsky,Reinhard,and Lyons.
Theother members of the research team included Xiangli Wang,a postdoctoralfellowat Y Thomas Johnson,of the University of I DanielleThomson,ofCarleton U Peter McGoldrick,of the University of TandWoodward Fischer,of the California Institute of Technology.
16.The study discovered the rise of animals occurred earlier than theProterozoicperiod.
A.Right B.Wrong C.Not mentioned
17.Many researchers believe the oxygen level was high during pre-animaltimes.
A.Right B.Wrong C.Not mentioned
18.The team was funded by several research institutes.
A.Right B.Wrong C.Not mentioned
19.Genetic advancements triggered the rise of animals.
A.Right B.Wrong C.Not mentioned
20.The samples studied in the research were collected in ocean areas.
A.Right B.Wrong C.Not mentioned
21.The study revealed that chromium found in Earth's continental crustremained stablebefore and after the rise of animals.
A.Right B.Wrong C.Not mentioned
22.Tim Lyons liked to play computer games in his spare time.
A.Right B.Wrong C.Not mentioned
答案：BACBABC
第三部分：概括大意与完成句子
FirstImage-recognition Software
1.Dartmouth researchers and their colleagues have created an artifi
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