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
24
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.
Which of the following statements is the results of Dr. Strander’s experiments with interferon?
选项
A、Half of the patients who received interferon reacted favorably.
B、At the end of three years, all of the patients who had not received interferon had died.
C、Most of the patients who received interferon also needed conventional treatments.
D、70 percent among patients who were treated with interferon survived.
答案
D
解析
文中第四段最后一句说:“与那些接受常规治疗的癌症病人相比,在接受干扰素治疗的癌症病人中生存期超过三年的比率是70%,而接受常规治疗的癌症病人的生存比率仅为10%至30%。”由此可知,选项D正确。
转载请注明原文地址:https://kaotiyun.com/show/SLXO777K
0
在职攻硕英语联考
相关试题推荐
Formanypeople,overeatingandoverspendingareas______toChristmasascandlesandholly.
Tomostofus,nuclearisanall-or-nothingword.Nuclearwarisunthinkable.Nuclearweaponsmustneverbeused.Nuclearpower
Intoday’sfreneticworkplace,wheredistractionsareconstantandcompetitionisoftenfierce,stresshasneverbeenhigher.Fr
Intoday’sfreneticworkplace,wheredistractionsareconstantandcompetitionisoftenfierce,stresshasneverbeenhigher.Fr
Thosewho’veheardofZaneGreyusuallyidentifyhimastheauthorofbest-sellingwesterns,butfewrealizethathewasthecom
Achildwhohasoncebeenpleasedwithatalelikes,asarule,tohaveitretoldinidenticallythesamewords,butthisshould
Thewritingofahistoricalsynthesisinvolvesintegratingthematerialsavailabletothehistorianintoacomprehensiblewhole.
FromthebeginningoftheRepublic,Americanshaveenjoyedaccusingthefirstmagistrateofkinglyambition.Sometimesseriously
ThenewtechnologicalrevolutioninAmericannewspapershasbroughtincreased______,awiderrangeofpublicationsandanexpans
By1830theformerSpanishandPortuguesecolonieshadbecomeindependentnations.Theroughly20million【C1】______ofthesenati
随机试题
_______________出现以前的横断层面上无尾状叶,_______________出现以后的横断层面上固有尾状叶消失;第二肝门至胆囊窝之间的横断层面上,尾状叶借_______________裂与_______________叶、__________
资金流量表按机构部门顺序排列,其包括的部门有()
根据《民事诉讼法》的规定,下列关于审判制度的表述中,不正确的是()。
下列各项内容构成融资租赁中最低租赁付款额的组成部分的是()。
阅读下列材料,完成小题。材料一“厄尔尼诺”是指在赤道太平洋东部的大面积海域,出现呈2—7年周期性的海水温度异常增高的现象。“厄尔尼诺”影响范围广、危害大,在全世界范围内造成巨大的经济损失。材料二下图是“厄尔尼诺”年份海水温度距平等值线图(单位℃)。
皮肤破损出血、颈髓损伤、锐器插人体内、严重挤压伤等是灾害发生时的常见损伤类型,掌握科学的自救方法对于延续生命、等待救援很重要。下列自救措施中,恰当的是()。
生命意义的问题不可能还原为经验研究。如果所有认识论上的问题都可以由科学探究在实践中得到解决,那么,我们可能会觉得,即使所有这些问题在一觉醒来都得到了解决,这仍然与生命的意义这一问题毫无瓜葛,与美好的人类生活究竟包含着什么这个问题无关。这段文字所表达的主要意
什么是“导向需求”?宅与“议程设置”效果有什么关联?
关于数据库应用系统的需求分析工作,下列说法正确的是()。
Agloomyafternoonsawmetakingmyroutinepaththroughthatconstructionsite.Forthewalker’sconvenience,asetofstones
最新回复
(
0
)