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
Doctors, sixty years ago, could do little to help victims of polio. Serious cases usually ended in death. In 1955, a vaccine was
Doctors, sixty years ago, could do little to help victims of polio. Serious cases usually ended in death. In 1955, a vaccine was
admin
2011-01-21
99
问题
Doctors, sixty years ago, could do little to help victims of polio. Serious cases usually ended in death. In 1955, a vaccine was developed that prevented the disease. Today, polio is no longer a major health problem.
Many of the most important drugs that doctors prescribe today have been developed in the last 30 years. Modern drugs are complex, specific and powerful. People need to know more about drugs in order to use them safely.
Early people discovered by accident that some of the plants growing around them seemed useful to heal sores, relieve pain, or even cure diseases. These plants were the first drugs. Now plants are still the source of some drugs. Quinine, for example, is a bitter-tasting drug used to treat the chills and fever of malaria and to reduce attacks of the disease. It is made from the bark of the cinchona tree, which grows in the Andes Mountains. The Indians of that region were the first to use the bark as a medicine. The Spanish people probably brought it to Europe in the early 1600s. Chemists learned how to get the pure drug from the bark and in 1944;it was made artificially in the laboratory.
Other important drugs, such as hormones and vaccines, are obtained from animals. But most of the modern drugs come from chemical combinations worked out by research scientists. Most people never see drugs in their simple form as chemicals. Instead, they are seen as tablets, capsules or liquids that contain the drug and other ingredients.
People use drugs to get different results. Some drugs attack the organism that causes a disease. They cure by killing the organism. Other drugs relieve what we call the symptoms of the disease, the headache, pain, fever or chills, and make the patient more comfortable. These constitute most over-the-counter drugs. People can get them in drug stores.
What is the main idea of this passage?
选项
A、The development of modern drugs.
B、How to make drugs.
C、How to use drugs safely.
D、The development of drugs.
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/yT3d777K
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
Everyoneknowsthattaxationisnecessaryinamodernstate:21it,itwouldnotbepossibletopaythesoldiersandpolicemenw
Everyoneknowsthattaxationisnecessaryinamodernstate:21it,itwouldnotbepossibletopaythesoldiersandpolicemenw
Everyoneknowsthattaxationisnecessaryinamodernstate:21it,itwouldnotbepossibletopaythesoldiersandpolicemenw
ThehistoryofEnglishisconventionally,ifperhapstooneatly,dividedintothreeperiodsusuallycalledOld(orAnglo-Saxon)E
Afewyearsagoitwasfearedthattheinvestorsbuyinguponemediacompanyafteranotherandloadingthemwithdebtwouldruin
Atourhouse,nobodygetsmoremailthanJake:catalogs,coupons,andofferstosubscribetomagazines.【T1】Heisalsourgedto
Atourhouse,nobodygetsmoremailthanJake:catalogs,coupons,andofferstosubscribetomagazines.【F1】Heisalsourgedto
WheneverIseeanyonebuyingaNationalLotteryticketIwanttostopthemandaskiftheyknowjustwheretheirmoneyisgoing.
Therearetwoaspectswhichdetermineanindividual’sintelligence.ThefirstistheDrainbeisborn【C1】______Humanbrainsdiff
Therearetwoaspectswhichdetermineanindividual’sintelligence.ThefirstistheDrainbeisborn【C1】______Humanbrainsdiff
随机试题
患者,女,38岁。妊娠30周,自觉头痛、眼花1天。检查:血压160/110mmHg,胎心、胎位正常,双下肢水肿,尿蛋白>0.5g/24h。此患者的诊断是先兆子痫。首选的治疗药物是
散射线对照片影响的描述,正确的是
下列属于水肿肝败不治的是
男,10岁,右足底被铁锈钉刺伤10天,突然出现张口困难,继之出现苦笑面容,角弓反张,声响及触碰病人可诱发上述症状,病人神志清楚,不发热。该病属于
对地下工程围岩出现的拉应力区多采用的加固措施是()。【2014年真题】
间接调控实际上是一种超经济的强制性调节。()
小明家8月份收入8000元,包括爸爸在国企的工资、奖金4000元,妈妈在私营企业的工资3000元,股票收入1000元。小明家本月取得收入的形式有()。
下列哪一诗句描述的节日与其他三句不同?
简要分析抗战胜利后中国内战爆发的基本原因。
(2012年真题)张某等五人劫持了甲与乙,然后命令甲杀死乙,否则将杀死甲。甲被逼无奈用绳子勒死了乙。根据刑法规定,甲的行为属于()。
最新回复
(
0
)