首页
登录
职称英语
For about three centuries we have been doing science, trying science out, us
For about three centuries we have been doing science, trying science out, us
游客
2024-06-03
53
管理
问题
For about three centuries we have been doing science, trying science out, using science for the construction of what we call modem civilization. Every dispensable item of contemporary technology, from canal locks to dial telephones to penicillin, was pieced together from the analysis of data provided by one or another series of scientific experiments. Three hundred years seems a long time for testing a new approach to human inter-living, long enough to set back for critical appraisal of the scientific method, maybe even long enough to vote on whether to go on with it or not. There is an argument.
Voices have been raised in protest since the beginning, rising in pitch and violence in the nineteenth century during the early stages of the industrial revolution, summoning urgent crowds into the streets on the issue of nuclear energy. "Give it back," say some of the voices, "It doesn’t really work, we’ve tried it and it doesn’t work. Go back three hundred years and start again on something else less chancy for the race of man."
The principle discoveries in this century, taking all in all, are the glimpses of the depth of our ignorance of nature. Things that used to seem clear and rational, end matters of absolute certainty—Newtonian mechanics, for example—have slipped through our fingers; and we are left with a new set of gigantic puzzles, cosmic uncertainties, and ambiguities. Some of the laws of physics are amended every few years; some are canceled outright; some undergo revised versions of legislative intent as if they were acts of Congress.
Just thirty years ago we call it a biological revolution when the fantastic geometry of the DNA molecule was exposed to public view and the linear language of genetics was decoded. For a while, things seemed simple and clear: the cell was a neat little machine, a mechanical device ready for taking to pieces and reassembling, like a tiny watch. But just in the last few years it has become almost unbelievably complex, filled with strange parts whose functions are beyond today’s imagining.
It is net just that there is more to do, there is everything to do. What lies ahead, or what can lie ahead if the efforts in basic research are continued, is much more than the conquest of human disease or the improvement of agricultural technology or the cultivation of nutrients in the sea. As we learn more about fundamental processes of living things in general we will learn more about ourselves. [br] Now scientists have found in the past few years ______.
选项
A、the exposure of DNA to the public is unnecessary
B、the tiny cell in DNA is a neat little machine
C、man knows nothing about DNA
D、man has much to learn about DNA
答案
D
解析
推断题。由文章第四段可知,30年前人们将DNA的发现称为生物革命,刚开始时,人们认为DNA细胞很简单,但随着时间的推移,人们发现它其实极为复杂,由此推断,人们还需要进一步研究,所以D正确。
转载请注明原文地址:http://tihaiku.com/zcyy/3618083.html
相关试题推荐
Foraboutthreecenturieswehavebeendoingscience,tryingscienceout,us
Foraboutthreecenturieswehavebeendoingscience,tryingscienceout,us
Foraboutthreecenturieswehavebeendoingscience,tryingscienceout,us
[originaltext]Sciencefictionwritershaveoftenimaginedhumanbeingsgoin
TheScienceofInterruptionsIn2000,Gl
TheScienceofInterruptionsIn2000,Gl
TheScienceofInterruptionsIn2000,Gl
TheScienceofInterruptionsIn2000,Gl
TheScienceofInterruptionsIn2000,Gl
Manyobjectsindailyusehaveclearlybeeninfluencedbyscience.However,
随机试题
Ascientistoncesaid,"Ihaveconcludedthattheearthisbeingvisitedby
Mostshoplifters(商店扒手)agreethattheJanuarysalesofferwonderfulopportu
下列关于此批复内容的说法,错误的是()。 A.从开头引语可得知,海关总署向
人防工程的平时用途,不宜设置下列哪一项?()A.医院病房 B.电影院 C
动态血压监测,测压间隔时间可选择15分钟、20分钟或()分钟。血压读数应达到
项目法人责任制由项目法人对()等实行全过程负责。A:项目策划 B:资金筹措
和巴比妥类比较,苯二氮(艹卓)类不具备A.麻醉作用 B.催眠作用 C.抗惊厥
价值规律是指在商品经济中,商品的价值取决于生产商品的社会必要劳动时间和商品以价
王某为某企业员工,2020年发生了如下经济行为: (1)王某每月扣除社保、公积
某工程出现施工安全事故,造成6000万元直接经济损失,该事故属于()。A.
最新回复
(
0
)