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
Chemistry plays an important part in our life. The【1】______ of a clock, 【1】______ the clothes we wear, and our leather shoe
Chemistry plays an important part in our life. The【1】______ of a clock, 【1】______ the clothes we wear, and our leather shoe
admin
2013-01-24
37
问题
Chemistry plays an important part in our life. The【1】______ of a clock, 【1】______
the clothes we wear, and our leather shoes are all made【2】______. 【2】______
the water we drink is chemically purified. The glass and【3】______ of the mirror,【3】______
the manufacturing of light bulbs, the paint and plaster on our walls require chemistry. The cooking, digestion and assimilation of the food are all chemical【4】______ 【4】______
The construction of an automobile may require
many kinds of chemically made【5】______. 【5】______
Chemistry and its【6】______ have helped us to live longer. 【6】______
The science of medicine also【7】______ heavily upon chemistry. 【7】______
And with【8】______ and antiseptics, surgery is no longer crude and limited. 【8】______
Our increasing knowledge of the chemical【9】______ that take place in the human body results in great strides in modern medicine. 【9】______
Fortunately, most of us do not need a profound knowledge of chemistry, but some understanding of chemistry should be a part of the【10】______ of every educated person. 【10】______
【5】
Chemistry deals with the materials of which the world is composed and the changes they many undergo. All of us, whether we are farmers, merchants, doctors, mechanics, chemists, housewives, or students, use this science directly or indirectly in a thousand ways every day. Our lives are made longer, healthier, richer, more convenient, and more pleasant because of chemistry.
We need only consider our daily routine activities to appreciate the part chemistry plays in everyday life. The clock that wakes us in the morning probably has in its mechanism half a dozen different metals or alloys, all of which were prepared by chemical processes. The clothes we put on were bleached and dyed chemically, or perhaps woven from synthetic materials produced by chemical processes devised by man. The leather in our shoes was tanned and dyed with chemicals. The water with which we wash is chemically treated to purify, and, sometimes, to soften it. The soap, toothpaste, shaving cream or cosmetics we use are all chemical products. Chemistry is involved in the glass and silvering of the mirror, in the manufacture of light bulbs, and the paint and plaster on our wills. The food for breakfast is cooked, digested, and assimilated in our bodies by chemical processes. We drive to work or school in and automobile which may be constructed of a hundred different kinds of steel, to say nothing of the other metals and alloys, plastics, rubber, and fuels and lubricants which power or protect it. All of these were prepared by chemical processes.
The science of medicine draws heavily upon chemistry, and many of us are alive today because of chemical products. Evidence indicates that, in ancient Rome, life expectancy averaged 22 years. Yet, in 1912 life expectancy in the United States averaged about 49 years. Now it has reached 70 for men and 73 for women. Chemistry and its products have played an important part in this increase in the life span of man.
Modem surgery is dependent upon anesthetics and antiseptics. Ether was first used as an anesthetic by Long in 1842. Chloroform was used a few years later. Before that time the patient might have been given opium derivatives or whiskey, or he might simply have been held down. Surgery was necessarily very crude and limited. Semmelweis in 1847 discovered that the hands, instruments, and clothing of the doctor could carry infection, and demanded that doctors maintain higher standards of cleanliness. In 1877 in Germany, Koch proved that germs caused disease or infection, and that they could often be controlled by chemicals. Pasteur’s work on the destruction of bacteria in food was done in the early 1860s.
The sulfa drugs developed in the 1930s proved to be powerful weapons against disease, and a little later the antibiotics were an even more important breakthrough in the fight against germs. Epidemics of typhus, cholera, diphtheria, and smallpox, which once swept the land, bringing death or disfiguration, are virtually a thing of the past now in most of the world. Chemistry has played a mighty part in their defeat. The great strides being made in modem medicine are largely the result of an increasing knowledge of the chemical reactions that take place in the most complex of all chemical systems, the human body. Fortunately, most of us do not need a profound knowledge of chemistry in order to use the chemical processes and chemical products of modem living. Some understanding of the principles, processes, and applications of chemistry, nevertheless, should be a part of the background of every educated person.
选项
答案
materials
解析
转载请注明原文地址:https://kaotiyun.com/show/NqaO777K
0
专业英语八级
相关试题推荐
A、Ithasnowdevelopedintoamoderncity.B、Thefirstsettlerstherewereallfreedblackslaves.C、Itusedtobeabarrenspot
DavidLandes,authorofTheWealthandPovertyofNations:WhySomeAreSoRichandSomeSoPoor,creditstheworld’seconomica
Britain’seastmidlandswereoncethepictureofEnglishcountryside,alivewithflocks,shepherds,skylarksandbuttercups—the
A、Art.B、French.C、German.D、Chemistry.A
EducationalValuesLifeisratherhecticforstudentsduringthefirstweekatNorthAmericanuniversities.However,students
TheImportanceofQuestionsFornon-nativespeakersofEnglishwhowanttoparticipateingroupdiscussions,itisimportant
TheImportanceofQuestionsFornon-nativespeakersofEnglishwhowanttoparticipateingroupdiscussions,itisimportant
WhenscientistsattheAustralianInstituteofSportrecentlydecidedtochecktheVitaminDstatusofsomeofthatcountry’sel
Eversincethefamilymovedtothesuburbslastyear,theycouldhaveenjoyedbetterhealth.
______ismadeupfromthefirstlettersofthenameofanorganization,suchasCIA,PLO,MIT.
随机试题
构成行政组织的物质要素包括()
“鸡尾酒疗法”常用的复合用药方式是
A.牛B.羊C.猪D.马E.犬卵巢上有排卵窝的家畜是
政府为管理土地市场,由专门部门、专门人员评定的不同等级或不同区域的土地使用权市场平均价格称为()。
某班学生做完早操回到教室,忽然有人发出“哎哟”的叫声,老师发现原来有人在班干部的凳子上反钉了几颗钉子。下列处理方式中,最恰当的一项是()。
贯彻新课程“以人为本”的教育理念首先应该做到()。
据统计,全球讲英语的人口达17亿,说英语的国家国内生产总值占全球的40%,全世界半数以上的科技书刊和译著都用英语,全球开设国际广播电台的86个国家中,只有8个没有英语,互联网上80%以上的网页使用英文;而开设汉语广播的只有20个国家,中文网页只占12%。现
越南的现代国服()是在中国汉代的汉服基础上改造而成的。
下列关于BSP的说法中不正确的是
Fire,scientistsagree,helpedgiverisetoasuccessful,thrivinghumanpopulationbyprovidingheatforcookingandprotection
最新回复
(
0
)