首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
For several years, scientists have been testing a substance called interferon, a potential wonder drug that is proving to be eff
For several years, scientists have been testing a substance called interferon, a potential wonder drug that is proving to be eff
admin
2012-07-17
29
问题
For several years, scientists have been testing a substance called interferon, a potential wonder drug that is proving to be effective in treating a variety of ailments, including virus infections, bacteria infections, and tumors. To date, the new drug has provoked no negative reaction of sufficient significance to discourage its use. But in spite of its success, last year only one gram was produced in the entire world.
The reason for the scarcity lies in the structure of interferon. A species specific protein, the interferon produced from one animal species cannot be used in treating another animal species. In other words, to treat human beings, only interferon produced by human beings may be used. The drug is produced by infecting white blood cells with a virus. Fortunately, it is so potent that the amount given each patient per injection is very small.
Unlike antibiotics, interferon does not attack germs directly. Instead, it makes unaffected cells resistant to infection, and prevents the multiplication of viruses within cells.
As you might conclude, one of the most dramatic uses of interferon has been in the treatment of cancer. Dr. Hans Strander, research physician at Sweden’s famous Karohnska Institute, has treated more than one hundred cancer patients with the new drug. Among a group of selected patients who had undergone surgical procedures for advanced cancer, half were given conventional treatments and the other half were given interferon. The survival rate over a three-year period was 70 percent among those who were treated with interferon as compared with only 10 to 30 percent among those who had received the conventional treatments.
In the United States, a large-scale project supported by the American Cancer Society is now underway. If the experiment is successful, interferon could become one of the greatest medical discoveries of our time.
In what does interferon differ from antibiotics?
选项
A、Interferon has serious side effects, whereas antibiotics do not.
B、Interferon is available in large supply, whereas antibiotics are not.
C、Antibiotics are very potent, while interferon is not.
D、Antibiotics kill germs by attacking them directly, while interferon does not.
答案
D
解析
文中第三段第一句说:“与抗生素不同,干扰素并不直接进攻细菌。”由此我们可以推断出,抗生素是直接进攻细菌进而杀死它们,而干扰素却不是。因此选项D正确。本题亦可以通过排除法找到答案。选项A“干扰素有严重的副作用,而抗生素却没有”与文中内容不符。第一段第二句说:“截止到目前,这种新药还没有因为副作用明显而引起人们的抵制。”由此选项A可排除。选项B“干扰素有大量的供给来源,而抗生素却没有”。文中第一段最后一句说:“但是,尽管它获得了成功,全世界去年却只生产了1克。”文中第二段又对干扰素的缺乏原因作了解释。由此选项B可排除。选项C“抗生素是有效的,而干扰素却不是”。在文中第一段第一句中说:“……一种有可能成为特效药的药物已经被证明在治疗各种疾病方面是有效的……”。由此,选项C可排除。
转载请注明原文地址:https://kaotiyun.com/show/eLXO777K
0
在职攻硕英语联考
相关试题推荐
BytheendoftheMiddleAgesthetechnologicalsystemscalledcitieshadlongsincebecomeacentralfeatureofWesternlife.I
Althoughthereareplansto______additionalpensions,thiswillnotaffectanyoneretiringbefore1998andwillonlymarginall
Cultureistransmittedlargelybylanguageandbythenecessityforpeopleinclosecontacttocooperate.Themoreextensivethe
It’saMondaynightatMIT,justafewweeksbeforefinalexams.GradstudentsTeginTeichandToddSchenkcouldbestudyingor
Thewritingofahistoricalsynthesisinvolvesintegratingthematerialsavailabletothehistorianintoacomprehensiblewhole.
Whileacountry’seconomyisbecomingthemostpromisingintheworld,itspeopleshouldbemore______abouttheirqualityoflif
Doyouthinkpeopleshouldbuythingsmadeintheirowncountry,evenwhenthepriceishigherthanthesamethingsmadesomewhe
By1830theformerSpanishandPortuguesecolonieshadbecomeindependentnations.Theroughly20million【C1】______ofthesenati
OnSeptember13,theNewYorkCityHealthDepartmentbecamethefirstinthenationtobanthesaleofsugaredbeverageslarger
随机试题
___________年,南丁格尔在英国伦敦的圣多马医院开办了第一所护士学校。
A.500mlB.1000mlC.2000mlD.5000mlE.6000ml股骨干骨折最多出血可达
把人力看成劳动力,劳动力等同于劳动者,认为人力资源即是具有劳动能力的全部人口。这种表述反映的是()。
施工合同示范文本规定,发包人应完成的工作包括( )。
关于水泥凝结时间的描述,正确的是()。
某输变电工程公司在浙江省经竞标,获得了一500kV的变电站建设项目和20km输电线路的架设项目,设备由浙江省电力公司经国网公司集中采购。在施工过程中发生了一系列问题:其一,在组立铁塔时,因设置缆风绳和铁塔组片,损坏了村民的庄稼和果树,与村民就赔偿问题发生矛
产生应纳税暂时性差异的是()。
某企业于2008年8月在例行税务稽查中,被查出少计收入,应补增值税20万元,欠税未补。2008年7月末留抵税额为18万元。企业以留抵税额抵欠税的会计处理为( )。
进行市场细分的客观前提是()。
能直接与CPU交换信息的存储器是()。
最新回复
(
0
)