首页
登录
职称英语
At the turn of the 20th century, Dutch physician Christiaan Eijkman showed
At the turn of the 20th century, Dutch physician Christiaan Eijkman showed
游客
2023-12-10
44
管理
问题
At the turn of the 20th century, Dutch physician Christiaan
Eijkman showed that disease can be caused not only by
microorganisms but by a dietary efficiency of certain substances【M1】______
now called vitamins. In 1909 German bacteriologist Paul Ehrlich
introduced the world’s first bactericide, a chemical designed to kill
specific kinds of bacteria with killing the patient’s cells as well.【M2】______
Following the discovery of penicillin in 1928 by British
bacteriologist Sir Alexander Fleming, antibiotics joined medicine’s
chemical armory, making the fight against bacterial infection
almost a routine matter. Antibiotics cannot act as viruses, but【M3】______
vaccines have been used to greatly effect to prevent some of the【M4】______
deadliest viral diseases. Smallpox, once a worldwide killer, was
completely eradicated by the late 1970s, and in the United States a【M5】______
number of polio cases dropped from 38,000 in the 1950s to less
than 10 a year by the 21st century.
By the middle of the 20th century scientists believed they
were well on the way to treating, preventing, or eradicating many
of the most deadly infectious diseases that plagued humankind for【M6】______
centuries. And by the 1980s the medical community’s confidence【M7】______
in its ability to control the infectious diseases had been shaken by【M8】______
the emergency of new types of disease-causing microorganisms.【M9】______
New cases of tuberculosis developed, caused by bacteria strains
that were resistant to antibiotics. New, deadly infections on which【M10】______
there was no known cure also appeared, including the viruses that
cause hemorrhagic fever and the human immunodeficiency virus
(HTV), the cause of acquired immunodeficiency syndrome. [br] 【M5】
选项
答案
a—the
解析
语法错误。a number of意思为“许多”,大量”,the number of意思为“……的数量”。此处说的应该是小儿麻痹症数量的减少,患者人数从20世纪50年代的8万人降到2l世纪的一年不到10人。因此,将不定冠词a改为定冠词the。
转载请注明原文地址:https://tihaiku.com/zcyy/3260048.html
相关试题推荐
AsthemerchantmanclassexpandedintheeighteenthcenturyNorth1.______.
AsthemerchantmanclassexpandedintheeighteenthcenturyNorth1.______.
AsthemerchantmanclassexpandedintheeighteenthcenturyNorth1.______.
AsthemerchantmanclassexpandedintheeighteenthcenturyNorth1.______.
AsthemerchantmanclassexpandedintheeighteenthcenturyNorth1.______.
WhichofthefollowingisthemostsignificantAmericanpoemofthe20thcentury
______wasconsideredtobethegreatestdramatistinthe18thcentury.A、HenryF
ThegreatdividinglinebetweenthenineteenthcenturyandthecontemporaryAmer
The18thcenturywitnessedanewliteraryform—the______modernEnglishnovel,wh
TheEnglishCivilWarinthe17thcenturyisalsocalled______A、thePuritanRev
随机试题
Whatinformationwasgivenbyeachwriter?Chooseyouranswersfromtheboxand
HowbadlyhasthegreatrecessionstruckAmerica?Theheadlinejoblessfigur
TosavetheAmazonrainforestfromdestruction,itisnecessarytofindac
TheIndiancoastalbelthasnotrecordedmanyTsunamisinthepast.Wavesco
下列句子中成语使用恰当的一句是( )。A.小明约好小刚今天下午五点到新华书店门口
入汤剂宜烊化的药物是A.胶质类 B.种子类 C.矿物、贝壳类 D.果实类
土石坝施工中,铺料与整平时应注意( )。 A、铺料宜平行坝轴线进行,铺土厚度
某男,58岁,因下肢静脉曲张行高位结扎及剥脱术后4小时,因站立排尿,小腿部伤口处
某公司发行票面额为2000万元的优先股股票,筹资费率为2%,股息年利率为
下列事项中,属于专利权保护对象的是()。A.施工企业的名称或标志 B.施工企业
最新回复
(
0
)