2021年职称英语考试《综合类》考试共65题，分为单选题。小编每天为您准备了5道每日一练题目（附答案解析），一步一步陪你备考，每一次练习的成功，都会淋漓尽致的反映在分数上。一起加油前行。

1、Geology ａｎｄ　Heap(1)The importance of particular metals in the human diet has been realized within the past few decades, ａｎｄ　the idea that geology might be related to health has been recognized fｏｒa number of elements such as iodine, zinc ａｎｄ　selenium. Fｏｒexample, soils with low iodine contents produce crops, ａｎｄ　animals deficient in iodine. A lack of iodine in the human diet leads to some serious diseases.(2)The ultimate source of metals within the human body is rocks, which weather into soil, gaining ｏｒlosing some of their chemical constituents. The crops we eat ｓｅｌｅｃｔively remove from the soil the elements that they require fｏｒgrowth. The water we drink contains trace elements leached from rock ａｎｄ　soil. Thus the geology ａｎｄ　geochemistry of the environment have effects on the chemistry ａｎｄ　health of plants, animals ａｎｄ　people.(3)So far there is no data to suggest that people living on metal-rich soils experience a potential health hazard. The levels of metals within naturally contaminated soils are generally not high enough to cause serious health problems. Living on metal-rich soils does not represent a health risk unless large quantities of soil are digested ｏｒmetal-rich dust is inhaled. However, small children are particularly exposed to metal-rich topsoil in playgrounds ａｎｄ　gardens. They are also the most likely ones to eat potentially dangerous metal-rich soil.(4)Heavy metals are persistent: they do not break down to other chemicals in the environment. Industrially polluted sites usually undergo intensive clean-up ａｎｄ　rehabilitation because heavy metals are a health concern once they enter the food chain. Some trace metals are alleged to cause cancer ａｎｄ　are also known to cause poisoning(5)In contrast, naturally contaminated soils have not been subject too risk assessment studies ａｎｄ　rehabilitation measures, despite the fact that they frequently possess metal concentrations well above those of such polluted by humans ａｎｄ　above environmental quality criteria.(6)There is a vital need to understａｎｄ　the potential risks ａｎｄ　long-term health effects of living on naturally contaminated soils. Future environmental investigations of naturally polluted soils should concentrate on the potential pathways of metals into the food chain ａｎｄ　human body. Geologists should be part of such studies as they can provide the essential background information on rock ａｎｄ　soil chemistry as well as the chemical forms of heavy metal pollution.Paragraph 3 ______【单选题】

A.No Evidence to Indicate Bad of Naturally Contaminated Soil

B.Potential Hazards of Human Contaminated Soils

C.Research an Channels of Heavy Metals Getting into Human Food Chain

D.Geology ａｎｄ　Health Problems

E.Rocks－－－－the Ultimate Source of Soil Pollution

F.Long-term Health Effects on Children

正确答案:A

答案解析:第3段谈及的是自然污染的土壤一般情况下对人体不会造成危害。此段首句就提示了这一点： So far there is no data to suggest that people living on metal-rich soils experience a potential health hazard.

2、Electric BackpackBackpacks are convenient. They can hold your books, your lunch, ａｎｄ　a change of clothes, leaving your hands free to do other things. Someday, if you don\'t mind carrying a heavy load, your backpacks might also power your MP3 player, keep your cell phone running, ａｎｄ　maybe even light your way home.Lawrence C. Rome ａｎｄ　his colleagues from the University of Pennsylvania in Philadelphia ａｎｄ　the Marine Biological Laboratory in Woods Hole, Mass, have invented a backpack that makes electricity from energy produced while its wearer walks. In military actions, search-and-rescue operations, ａｎｄ　scientific field studies, people rely increasingly on cell phones, global positioning system (GPS) receivers, night-vision goggles, ａｎｄ　other battery-powered devices to get around ａｎｄ　do their work. The backpack\'s electricity-generating feature could dramatically reduce the amount of a wearer\'s load now devoted to spare batteries, report Rome ａｎｄ　his colleagues in the Sept. 9, Science.The backpack\'s electricity-creating powers depend on springs used to hang a cloth pack from its metal frame. The frame sits against the wearer\'s back, ａｎｄ　the whole pack moves up ａｎｄ　down as the person walks. A gear mechanism converts vertical movements of the pack to rotary motions of an electrical generator, producing up to 7. 4 watts.Unexpectedly, tests showed that wearers of the new backpack ａｌｔｅｒtheir gaits in response to the pack\'s oscillations, so that they carry loads more comfortably ａｎｄ　with less effort than they do ordinary backpacks. Because of that surprising advantage, Rome plans to commercialize both electric ａｎｄ　non-electric versions of the backpack.The backpack could be especially useful fｏｒsoldiers, scientists, mountaineers, ａｎｄ　emergency workers who typically carry heavy backpacks. Fｏｒthe rest of us, power-generating backpacks could make it possible to walk, play video games, watch TV, ａｎｄ　listen to music, all at the same time. Electricity-generating packs aren\'t on the market yet, but if you do get one eventually, just make sure to look both ways before crossing the street!What is the most important feature of the backpack invented by Lawrence C. Rome ａｎｄ　his colleagues?【单选题】

A.It produces electricity fｏｒelectronic devices while the wearer walks.

B.It can be used as cell phones, GPS in the military actions ｏｒfield studies.

C.It is small ａｎｄ　convenient.

D.It is light ａｎｄ　easy to carry.

正确答案:A

答案解析:第2段的第1句说，Lawrence C. Rome及其同事们发明的这种背包，当背着背包走路时，会有电能产生。该段最后一句告诉我们，背包的这种性能可减少背包的重量，因为不必携带备用电池。

3、Intelligent Machines1. Medical scientists are already putting computer chips (芯片) directly into the brain to help people who have Parkinson\'s disease, but in what other ways might computer technology be able to help us? Ray Kurzweil is authｏｒof the successful book The Age of Intelligent Machines ａｎｄ　is one of the world\'s best computer research scientists. He is researching the possibilities.2. Kurzweil gets computers to recognize voices. An example of this is Ramona； the virtual (虚拟的) hostess of Kurzweil\'s homepage, who is programmed to understａｎｄ　what you say. Visitors to the site can have their conversations with her, ａｎｄ　Ramona also dances ａｎｄ　sings.3. Kurzweil uses this technology to help people with physical disabilities. One of his ideas is a "seeing machine". This will be "like a friend that could describe what is going on in the visible world", he explains. Blind people will use a visual sensｏｒ(探测器) which will probably be built into a pair of sunglasses. This sensｏｒwill describe to the person everything it sees.4. Another idea, which is likely to help deaf people, is the "listening machine". This invention will recognize millions of words ａｎｄ　understａｎｄ　any speaker. The listening machine will also be able to trans late into other languages, so even people without hearing problems are likely to be interested in using it.5. But it is not just about helping people with disabilities. Looking further into the future, Kurzweil sees a time when we will be able to download our entire consciousness onto a computer. This technology probably won\'t be ready fｏｒat least 50 years, but when it arrives, it means our minds will be able to live forever.Paragraph 4 ____【单选题】

A.A new pair of eyes

B.Computers that can communicate

C.Everlasting consciousness on a computer

D.Time to break off a friendship

E.An authｏｒａｎｄ　researcher

F.A new pair of ears

正确答案:F

答案解析:本题难度不大，第四段有明显的主旨句：Another idea, which is likely to help deaf people, is the“listening machine”，主要讲其如何帮助聋哑人听见东西。F项A new pair of ears，“一对新的耳朵”，可以概括本段内容，答案是F。

4、A Country\'s Standard of LivingThe "standard of living" of any country means the average person\'s share of the goods ａｎｄ　services the country produces. A country\'s standard of living, therefore, depends first on its capacity to produce wealth. "Wealth" in this sense is not money, fｏｒwe do not live on money but on things that money can buy: "goods such as food ａｎｄ　clothing", ａｎｄ　"services" such as transport ａｎｄ　entertainment.A country\'s capacity to produce wealth depends upon many factors most of which have an effect on one another. Wealth depends to a great extent upon a country\'s natural resources. Some region of the world are well supplied with coal ａｎｄ　minerals, ａｎｄ　have fertile (肥沃的) soil ａｎｄ　a favorable climate, other regions possess none of them.Next to natural resources comes the ability to turn them to use, China is perhaps as rich as the USA in natural resources, but suffered fｏｒmany years from civil ａｎｄ　external wars, Fｏｒthis ａｎｄ　other reasons it was unable to develop her resources. Sound ａｎｄ　stable political conditions, ａｎｄ　freedom from foreign invasions, enable a country to develop its natural resources peacefully ａｎｄ　steadily, to produce more wealth than other country.A country\'s standard of living does not only depend upon the wealth that is produced ａｎｄ　consumed within its own borders, but also upon what is directly produced through international trade. Fｏｒexample, Britain\'s wealth in foodstuffs ａｎｄ　other agricultural products would be much less if she had to depend only on those grown at home. Trade makes it possible fｏｒher surplus (剩余的) manufactured goods to be traded abroad fｏｒthe agricultural products ____ would otherwise be lacking. A country\'s wealth is, therefore, much influenced by its manufacturing capacity, providing that other countries can be found ready to accept its manufactures.【单选题】

A.who

B.which

C.where

D.when

正确答案:B

答案解析:本题有一定难度，干扰项干扰较大，本题考查引导非限制性定语从句的关系词，先行词是products，所以正确答案是B。

5、Gun Rights in the USImmediately after the shooting at Virginia Tech University, Americans gathered to mourn (致哀) the dead. The president ａｎｄ　the state governer both hurried there to share the grief. But the majority of Americans still cling to their right to own weapons.Strictly speaking, the US is not the only country here gun violence has destroyed lives, families ａｎｄ　communities in everyday circumstance. But the US is one of the few countries that seem unwilling ａｎｄ　politically incapable of doing anything serious to stop it.In countries like Britain ａｎｄ　Canada, the government adopted strict ____ control soon after serious gun violence incidents. US leaders, however, are held hostage by the gun lobby (院外活动集团) ａｎｄ　the electoral (选举) system.The powerful National Rifle Association, the majｏｒsupporter of gun rights in the US, is too strong fｏｒany party to take on. Most Republicans oppose gun control anyway. Over the years, the Democrats have found that they can either campaign fｏｒgun control ｏｒwin power, not both, they prefer power.According to the US Bureau of Justice Statistics, firearm (火器) incidents accounted fｏｒnine percent of the 4.7 million violent crimes in 2005. So although opinion polls show most Americans want stricter gun laws, many people don\'t want to give up their arms they keep to protect themselves.Dave Hancock, a Virginia gun lover, is one example. In an interview he said, "If one professｏｒin the Virginia incident had been carrying a legal weapon, they might have been able to stop all this. "In his opinion, the massacre (大屠杀) is an argument fｏｒmore people to carry weapons, not fewer.Americans\' clinging to the right to bear arms is not just a fear of crime, but a mistrust of government, commented UK\'s Guardian newspaper.One Virginia resident, who had a permit to carry a concealed (隐藏的) firearm, told the Guardian that it was every American\'s responsibility to have a gun."Each person," he said, "should not rely solely on the government fｏｒprotection."【单选题】

A.rocket

B.knife

C.gun

D.bullet

正确答案:C

答案解析:本题难度不大，干扰项干扰不强。文章全文都是在谈枪支控制问题，所以最佳答案是C。