2022年职称英语考试《卫生类》考试共65题，分为单选题和多选题和判断题和计算题和简答题和不定项。小编为您整理阅读理解分析5道练习题，附答案解析，供您备考练习。

1、Human Heart Can Make New CellsSolving a longstanding mystery, scientists have found that the human heart continues to generate new cardiac cells throughout the life span, although the rate of new cell production slows with age. The finding, published in the April 3 issue of Science, could open a new path fｏｒthe treatment of heart diseases such as heart failure ａｎｄ　heart attack, experts say. "We find that the beating cells in the heart, cardiomyocytes, are renewed," said lead researcher Dr. Jonas Frisen, a professｏｒof stem cell research at the Karolinska Institute in Stockholm, Sweden. "It has previously not been known whether we were limited to the cardiomyocytes we are born with ｏｒif they could be renewed," he said. The process of renewing these cells changes over time, Frisen added. In a 20-year-old, about 1 percent of cardiomyocytes are exchanged each year, but the turnover rate decreases with age to only 0. 45 percent by age 75, "If we can understａｎｄ　how the generation of new cardiomyocytes is regulated, it may be potentially possible to develop pharmaceuticals that promote this process to stimulate regeneration after fｏｒexample, a heart attack, "Frisen said. That could lead to treatment that helps restore damaged hearts. A lot of people suffer from chronic heart failure," noted co-authｏｒDr. Ratan Bhardwaj. Ratan Bhardwaj, also from the Karolinska Institute. "Chronic heart failure arises from heart cells dying," he said. With this finding, scientists are "opening the doｏｒto potential therapies to having ourselves heal ourselves," Bhardwaj said. "Maybe one could devise a pharmaceutical agent that would make heart cells make new ａｎｄ　more cells to overcome the problem they are facing. " But barriers remain. According to Bhardwaj, scientists do not yet know how to increase heart cell production to a rate that would replace cells faster than they are dying off, especially in older patients with heart failure. In addition, the number of new cells the heart produces was estimated using healthy hearts-whether the rate of cell turnover in diseased hearts is the same remains unknown.It is not known yet if the rate of cell turnover in diseased hearts____. 【单选题】

A.s high enough to replace cells faster than they re dying off

B.is of any use to researchers

C.is the same as that in healthy hearts

D.changes over time

正确答案:C

答案解析:最后一句说：心脏产生的新细胞的数量是按照健康心脏计算的，而有心脏病的细胞更替率是否与健康心脏相同还不得而知。

2、Smart Window Windows not only let light in to cut down an electricity use fｏｒlighting, but the light coming through the window also provides heat. However, windows are not something people typically associate with being a cutting edge technology. Researchers are now working on new technologies that enable a window to quickly change from clear to dark ａｎｄ　anywhere in between with a flip of a switch. "It took us a long time to figure out what a window really is," says Claes Granqvist. He\'s a professｏｒof solid-state physics at Uppsala University in Sweden. "It\'s contact with the outside world. You have to have visual contact with the surrounding world to feel well. " So, windows ａｎｄ　natural light are important fｏｒimproving the way people feel when they\'re stuck indoors. Yet, windows are the weak link in a building when it comes to energy ａｎｄ　temperature control. In the winter, cold air leaks in. When it\'s hot ａｎｄ　sunny, sunlight streams in. All of this sunlight carries lots of heat ａｎｄ　energy. ａｎｄ　all of this extra heat forces people to turn on their air conditioners. Producing blasts of cold air, which can feel so refreshing, actually suck up enormous amounts of electricity in buildings around the world. Windows have been a majｏｒfocus of energy research fｏｒa long time. Over the years, scientists have come up with a variety of strategies fｏｒcoating, glazing, ａｎｄ　layering windows to make them more energy efficient. Smart windows go a step further. They use chromogenic technologies which involve changes of color. Electrochromic windows use electricity to change color. Fｏｒexample, a sheet of glass coated with thin layers of chemical compound such as tungsten oxide works a bit like a battery. Tungsten oxide is clear when an electric charge is applied ａｎｄ　dark when the charge is removed, that is, when the amount of voltage is decreased, the window darkens until it\'s completely dark after all electricity is taken away. So applying a voltage determines whether the window looks clear ｏｒdark. One important feature that makes a smart window so smart is that it has a sort of "memory. " All it takes is a small jolt of voltage to turn the window from one state to the other. Then, it stays that way. Transitions take anywhere from 10 seconds to a few minutes, depending on the size of the window. The development of smart windows could mean that massive air conditioning systems may no longer need. "In the future," Granqvist says, "our buildings may look different. To make electrochromic windows change color, what is applied to the window glass? 【单选题】

A. Electricity.

B.Tungsten oxide.

C.A battery.

D.A voltage.

正确答案:B

答案解析:第五段第二句提供了答案。a sheet of glass coated with thin layers of chemical compound such as tungsten oxide中的coated是“涂上一层薄薄的……”的意思。

3、Egypt Felled by Famine Even ancient Egypt\'s mighty pyramid builders were powerless in the face of the famine that helped bring down their civilization around 2180 BC. Now evidence gleaned from mud deposited by the River Nile suggests that a shift in climate thousands of kilometers to the south was ultimately to blame ａｎｄ　the same ｏｒworse could happen today. The ancient Egyptians depended on the Nile\'s annual floods to irrigate their crops. But any change in climate that pushed the African monsoons southwards out of Ethiopia would have diminished these floods. Dwindling rains in the Ethiopian highlands would have meant fewer plants to stablize the soil. When rain did fall it would have washed large amounts of soil into the Blue Nile ａｎｄ　into Egypt, along with sediment from the White Nile. The Blue Nile mud has a different isotope signature from that of the White Nile. So by analyzing isotope differences in mud deposited in the Nile Delta, Michael Krom of Leeds University worked out what proportion of sediment came from each branch of the river. Krom reasons that during periods of drought, the amount of the Blue Nile mud in the river would be relatively high. He found that one of these periods, from 4,500 to 4,200 years ago, immediately predates the fall of the Egypt\'s Old Kingdom. The weakened waters would have been catastrophic fｏｒthe Egyptians. " Changes that affect food supply don\'t have to be very large to have a ripple effect in societies," says Bill Ryan of the Lamont Doberty Earth Observatory in New York. "Similar events today could be even more devastating," says team member Daniel Stanley, a geoarchaeologist from the Smithsonian Institution in Washington, D C. " Anything humans do to shift the climate belts would have an even worse effect along the Nile system today because the populations have increased dramatically. " Which of the following statements is true? 【单选题】

A.The White Nile is the trunk of the River Nile.

B.The White Nile is the trunk of the Blue Nile.

C.The White Nile is a branch of the Blue Nile.

D.The White Nile ａｎｄ　the Blue Nile are branches of the River Nile.

正确答案:D

答案解析: D说的是：青尼罗河和白尼罗河是尼罗河的支流。第四段中的最后一句话是这么说的：… worked out what proportion of sediment came from each branch of the river. 这里的“河”是指“尼罗河”，“每条支流”是指上文所说的“青尼罗河”和“白尼罗河”。因此，D是正确的答案。A：白尼罗河是尼罗河的干流。B：白尼罗河是青尼罗河的干流。C:白尼罗河是青尼罗河的支流。显然，这些都不是答案。

4、15 Million Americans Suffer from Social Anxiety DisorderSocial anxiety disｏｒｃｅｒprevents some 15 million Americans from leading normal social ａｎｄ　romantic lives, a new survey finds.The disｏｒｃｅｒleaves many isolated, ashamed ａｎｄ　often misdiagnosed. Thirty-six percent of those with social anxiety disｏｒｃｅｒhave symptoms fｏｒ10 years ｏｒmore before seeking help, the Anxiety Disorders Association of America reports."Social anxiety disｏｒｃｅｒis when somebody has an intense, persistent ａｎｄ　irrational fear of social ｏｒperformance situations," Jerilyn Ross, the association\'s president ａｎｄ　CEO, said during a teleconference Wednesday."The condition causes people to avoid common, everyday situations ａｎｄ　even other people fｏｒfear of being judged ｏｒcriticized ｏｒhumiliated ｏｒembarrassing themselves," Ross said.Social anxiety disｏｒｃｅｒcan interfere with daily routines ａｎｄ　job performance, Ross noted. "It also makes it very difficult fｏｒpeople to develop friends ａｎｄ　romantic partnerships," she said.People with this disｏｒｃｅｒrecognize their fear is excessive ａｎｄ　irrational, Ross noted. "But they feel powerless to do anything about it," she said.Social anxiety disｏｒｃｅｒcan start in the early teens, Dr. Mark H. Pollack, directｏｒof the Center fｏｒAnxiety ａｎｄ　Traumatic Stress Disorders ａｎｄ　a professｏｒof psychiatry at Harvard Medical School, said during the teleconference."This is a disｏｒｃｅｒthat starts affecting people early on," Pollack said. "The typical age of onｓｅｔis early adolescence, age 12 ｏｒ13, ａｎｄ　many individuals report a history of anxiety dating back to earlier childhood."The disｏｒｃｅｒalso has physical symptoms, including heart palpitations, feelings that their throat will close up, sweating, blushing, faintness, trembling ａｎｄ　stammering, Ross said.Among people with the disorder, 75 percent said the condition affected their ability to do normal activities. In addition, 69 percent said they didn\'t want people to think they were crazy, ａｎｄ　58 percent said they were embarrassed by their condition, Ross said.However, when the condition is diagnosed ａｎｄ　treated, many reported improvement in their lives. In fact, 59 percent who were receiving treatment said treatment had a positive effect on their ability to have a romantic relationship. In addition, 39 percent who had received treatment said knowing that treatment can be successful aided their decision to get help, Ross noted.Which is NOT true of people with social anxiety disorder?【单选题】

A.They\'re often isolated ａｎｄ　ashamed.

B.They find it difficult to make friends.

C.They often fail to get timely treatment.

D.They tend to judge ｏｒcriticize other people.

正确答案:D

答案解析:前三项在短文的第二段和第五段都有提及，只有第四项是错误的，他们不是常常评判或批评别人，而是害怕遭到别人的评判或批评。

5、Flu doesScratchy throats, stuffy noses ａｎｄ　body aches all spell misery, but being able to tell if the cause is a cold ｏｒflu may make a difference in how long the misery lasts.The American Lung Association (ALA) has issued new guidelines on combating colds ａｎｄ　the flu, ａｎｄ　one of the keys is being able to quickly tell the two apart. That\'s because the prescription drugs available fｏｒthe flu need to be taken soon after the illness sets in. As fｏｒcolds, the sooner a person starts taking over-the-counter remedy, the sooner relief will come.The common cold ａｎｄ　the flu are both caused by viruses. More than 200 viruses can cause cold symptoms, while the flu is caused by three viruses-flu A, B ａｎｄ　C. There is no cure fｏｒeither illness, but the flu can be prevented by the flu vaccine (疫苗), which is, fｏｒmost people, the best way to fight the flu, according to the ALA.But if the flu does strike, quick action can help. Although the flu ａｎｄ　common cold have many similarities, there are some obvious signs to look for.Cold symptoms such as stuffy nose, runny nose ａｎｄ　scratchy throat typically develop gradually, ａｎｄ　adults ａｎｄ　teens often do not get a fever. On the other hand, fever is one of the characteristic features of the flu fｏｒall ages. ａｎｄ　in general, flu symptoms including fever ａｎｄ　chills, sore throat ａｎｄ　body aches come on suddenly ａｎｄ　are more severe than cold symptoms.The ALA notes that it may be particularly difficult to tell when infants ａｎｄ　preschool age children have the flu. It advises parents to call the doctｏｒif their small children have flu-like symptoms.Both cold ａｎｄ　flu symptoms can be eased with over-the-counter medications as well. However, children ａｎｄ　teens with a cold ｏｒflu should not take aspirin fｏｒpain relief because of the risk of Reye syndrome (综合症), a rare but serious condition of the liver ａｎｄ　central nervous system.There is, of course, no vaccine fｏｒthe common cold but frequent hａｎｄ　washing ａｎｄ　avoiding close contact with people who have colds can reduce the likelihood of catching one.According to the author, knowing the cause of the misery will help ____.【单选题】

A.shorten the duration of the illness

B.the patient buys medicine over the counter

C.the patient obtain cheaper prescription drugs

D.prevent people from catching colds ａｎｄ　the flu

正确答案:A

答案解析:依据文章第一段可知“喉咙发痒、鼻子堵塞、全身酸痛都会让人感觉糟糕，但是从这些症状并不能判断是由伤风感冒引起的还是由流感引起的，能判断这种糟糕的感觉会持续多久”由此可直接选出正确答案是A。