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
Elizabeth Hazen and Rachel Brown copatented one of the most widely acclaimed wonder drugs of the post-Second World War years. Ha
Elizabeth Hazen and Rachel Brown copatented one of the most widely acclaimed wonder drugs of the post-Second World War years. Ha
admin
2011-01-06
63
问题
Elizabeth Hazen and Rachel Brown copatented one of the most widely acclaimed wonder drugs of the post-Second World War years. Hazen and Brown’s work was stimulated by the wartime need to find a cure for the fungus(真菌类) infections that afflicted many military personnel. Scientists had been feverishly searching for an antibiotic toxic enough to kill the fungi but safe enough for human use, since, unfortunately, the new "wonder drugs" such as penicillin and streptomycin(链霉素) killed the very bacteria in the body that controlled the fungi. It was to discover a fungicide without that double effect that Brown, of New York State’s Department of Health Laboratories at Albany, and Hazen, senior microbiologist at the Department of Health in New York, began their long-distance collaboration. Based upon Hazen’s previous research at Columbia University, where she had built an impressive collection of fungus cultures, both were convinced that an antifungal organism already existed in certain soils.
They divided the work. Hazen methodically screened and cultured scores of soil samples, which she then sent to her partner, who prepared extracts, isolated and purified active agents, and shipped them back to New York, where Hazen could study their biological properties. On a 1948 vacation, Hazen accidentally collected a clump of soil from the edge of W.B. Nourse’s cow pasture in Fauquier County, Virginia, that, when tested, revealed the presence of the microorganisms. In farm owner Nourse’s honor, Hazen named it Streptomyces noursci , and within a year the two scientists knew that the properties of their substance distinguished it from previously described antibiotics. After further research they eventually reduced their substance to a fine, yellow powder, which they first named "fungiciden", then renamed "nystatin"(to honor the New York State laboratory) when they learned the previous name was already in use. Of their major discovery, Brown said lightly that it simply illustrated "how unpredictable consequences can come from rather modest beginnings."
The word "both" in line 11 refers to ______.
选项
A、Hazen and Brown
B、penicillin and streptomycin
C、the Department of Health laboratories at Albany and New York
D、double effects
答案
A
解析
根据上文Hazen和Brown开始合作,鉴于Hazen以前的研究经验,和下文were convinced that(确信……)这层含义,both应该指的是Hazen和Brown。
转载请注明原文地址:https://kaotiyun.com/show/usmd777K
本试题收录于:
职称英语卫生类B级题库职称英语分类
0
职称英语卫生类B级
职称英语
相关试题推荐
Directions:Usingtheinformationinthetext,completeeachsentence6-10,withawordorphrasefromthelistbelow.Foreach
MillionsofAmericanslackhealthinsuranceand,withtheeconomyfloundering,thatislikelytoincrease,theNationalAcademy
ThecathasprobablybeenassociatedwithMansinceitwasfirstgivenaplacebyhisfireinreturnforkeepingthecavedwelli
TheopinionofmanyengineersisthatthearchitectsthatdesignedtheNewYorkWorldTradeCenterTwinTowersdidagoodjobin
Youandyourpartnerwillspeaktoeachother.Youwillaskandanswerquestions.Theexaminerwillgiveyouacardwithsomein
HowtheBodyKeepstheSameTemperatureThetemperatureofyourbodyshouldbealwaysjustthesame,nomatterwhetherthewe
It’simpolitetocutinwhentwopersonsareholdingaconversation.
Theseriouslydepressedpersonseeshimselfinaverynegativeway.Heissurethatheisaloneandhopeless.Heoftenblameshi
Between1986and1992intheUnitedStates,mortalityduetocoronaryheartdiseaseamongwhitemen45to74yearsofagedecrea
BeyondthePapScientistshaveknownforsometimethatvirtuallyallcasesofcervicalcanceraretriggeredbyafamilyof
随机试题
继发性高血压不见于
45岁女性,严重骨盆骨折,24小时尿量200ml,血钾5.9mmol/L,二氧化碳结合力13mmol/L,血尿素氮27mmol/L,下列治疗措施不正确的是
从业人员在接待顾客过程中,属于“忌语”的是()。
“十二五”期末,我国人口总量将达到13.9亿左右,城镇人口将首次超过农村人口突破()亿。
根据下列资料,回答下列问题。2014年上半年全国共生产汽车1178万辆,同比增长9.6%,其中,乘用车971万辆,同比增长12.1%;商用车207万辆,同比下降0.6%。销售汽车1168万辆,同比增长8.4%,其中乘用车963万辆,同比增长11.
下列不属于法的特征的是()。
法理学和法律史学属于()。
Thefollowingscenarioistobeusedforquestions30,31,and32.Gregisthesecurityfacilityofficerofafinancialinstitut
下面不属于需求分析阶段任务的是
FEIFEIELEVATORSisoneoftheleadingelevatorcompaniesintheworldwithmorethan120branchcompanies(分公司)aroundtheglobe.
最新回复
(
0
)