首页
登录
职称英语
Chemistry plays an important part in our life. The【1】______ of a clock, 【1】
Chemistry plays an important part in our life. The【1】______ of a clock, 【1】
游客
2023-12-11
32
管理
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 requirechemistry. 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 modem 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】______ [br] 【9】
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 walls. 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.
Modern 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 modern 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 modern 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
reactions
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3264672.html
相关试题推荐
Intheschoolsofancienttimes,themostimportantexaminationswerespoken
Intheschoolsofancienttimes,themostimportantexaminationswerespoken
Intheschoolsofancienttimes,themostimportantexaminationswerespoken
ThesecondlargestandmostimportantriverinBritainis______.A、theSevernRiv
TheLollardswere______whohadplayedaveryimportantroleinthePeasantUpris
ThemostimportantfeaturesinthegrowthoftheAmericaneconomyintheearly2
TheMidwestisAmerica’smostimportant______area.A、agriculturalB、industrialC
MobyDickisthemostimportantworkbyA、JackLondon.B、HermanMelville.C、Sincl
Themostimportant______magazinesinBritainareTheEconomist,TheNewStatesma
TheCalloftheWild,LoveofLifeandMartinEdenareimportantworksofA、Herma
随机试题
【1】[br]【4】[originaltext]Whiteneighborhoodsarebecomingdarkerincomple
Individualism,independence,andself-relianceareperhapsthemostdistin
患者,女,28岁。因工作不理想,心情抑郁,胁肋胀痛,月经失调,脉弦。治疗应首选的
1979年全国普通高校毕业生人数为8.5万人,1980年为14.7万人,2001
某商店同时卖出两件商品,每件各得60元,但其中一件赚20%,另一件亏本20%,问
关于小组目标制定原则的说法,不正确的是()。A.小组目标清楚,可以测量和评
下列句子中,加括号的词语运用有误的一句是()。A.禾苗把鸦鹊湖(伪装)成无边的草
美国供应管理协会(ISM)公布的制造业采购经理人指数(PMI)是一个综合性加权指
2019年甲服装公司(位于某县城)实际占地面积30000平方米,其中办公楼占地
选择应缩短持续时间的关键工作应考虑的因素不包括( )。A.缩短持续时间对质量和
最新回复
(
0
)