首页
登录
职称英语
" Copy the ways of nature," we were told. Yes, copy nature — for everything
" Copy the ways of nature," we were told. Yes, copy nature — for everything
游客
2024-09-16
31
管理
问题
" Copy the ways of nature," we were told. Yes, copy nature — for everything comes directly or indirectly from natural things. Often we have to put our knowledge to work, "treating" nature’s materials so as to make them serve our purposes better. We could, certainly, take the skin from a dead animal and at once make a pair of shoes with it: but they wouldn’t be very good shoes. For ourpurpose it is better first to treat the skin with chemicals that turn it into leather.
Until fairly recently our efforts to copy nature’s methods of manufacture were not very successful. Up to about 1950 only animal skins provided material for good shoes. Clothes had to be made of cotton from the cotton plant or of wool from sheep. The only kind of rubber we had came from the rubber tree. Close study of all such useful materials showed that their chemistry was simple in some ways, most complicated in others. Their basic chemicals are plentiful — and surprisingly similar: that is the simple part. It is the arrangement of their atoms in groups, and the way these groups are stung together in long "chains", that is so complicated. Nature’s methods of combing atoms are what make her materials so varied and so suited to her purposes.
From about 1930 chemists worked hard at the job of getting groups of atoms to combine in long chains. The "raw materials" they used were mainly the gases from coal and later from oil: and the chief means employed were heat and pressure. Some gases proved very active, combing readily, and combing with other gases too. The experiments were successful. A number of "new" materials were made.
Nylon was one of these new materials: nylon stockings first appeared in 1939. Other kinds of plastics followed — some in the form of soft thread(for clothing), strong hair-like threads(for brushes), glass-like material(for bottles)... All were man-made materials, man-made for man’s purposes, not for Nature’s. And because man made them, he could vary them to suit each new purpose as it arose. One of the gases is the starting material for a kind of rubber that, when used in motorcar tyre, prevents the tyres from slipping easily on wet roads. The plastics industry is no longer new. It has grown into the giant petrochemical industry, producing for our needs not only plastics but a wide range of cleaning materials, paints, fertilizers ... the list is long and growing longer. Nature is beginning to look like a slow and limited manufacturer. [br] Why is it often necessary for us to treat nature’s materials?
选项
A、An animal’s skin can be made into a pair of shoes for us.
B、Our purposes are not necessarily those of Nature.
C、There aren’t enough natural materials for our needs.
D、We try to copy nature — but it is difficult to do that.
答案
B
解析
事实细节题。通过第一段,尤其是Often we have to—our purposes better.这一句可以看出。A,C,D均不符合题意。
转载请注明原文地址:https://tihaiku.com/zcyy/3760419.html
相关试题推荐
[originaltext]W:Hello,Frank.M:Hello,Miriam.How’severythinggoing?W:Fin
[originaltext]W:Hello,Frank.M:Hello,Miriam.How’severythinggoing?W:Fin
[originaltext]W:Hello,Frank.M:Hello,Miriam.How’severythinggoing?W:Fin
"Copythewaysofnature,"weweretold.Yes,copynature—foreverything
PASSAGETWOWhatthenatureofinnovationis.在文章最后一段中被采访的人说出了自己对革新的本质的看法,即creativ
Everything_____verydifferentifyourfatherwerestillalive.A、willbeB、would
Thefansbesiegedthefootballplayertogethis_____.A、autographB、signatureC
(l)Virtuallyeverythingastronomersknownaboutobjectsoutsidethesolarsy
(l)Virtuallyeverythingastronomersknownaboutobjectsoutsidethesolarsy
_____hisbetternaturewepersuadedhimtochangehismind.A、AppealingtoB、Loo
随机试题
Marynevergoestothecinema,______?A、doesMaryB、doessheC、doesn’tsheD、d
小学英语《Kitty'smorning》 一、考题回顾 二、考
为了达到会见和会谈的目的,应首先()A.定好会见、会谈的时间 B.充分了解双
小赵、小钱、小孙、小李、小周五个人分一箱重100千克的水果,已知每人分的水果的重
()是指县级以上地方人民政府根据需要,在定期限内对本行政区域内的房屋进行统一的权
“飞入寻常百姓家”引自唐代诗人()《乌衣巷》。A.李白 B.刘禹锡 C
我国政策性银行成立于()。A:1985年B:1982年C:1983年D:1
在买方叫价交易中,如果现货价格变化不大,期货价格和升贴水呈( )变动。A.正相
共用题干 下面是某求助者的WAIS-RC的测验结果下列说法正确的包括()A:
钩端螺旋体病的临床表现分型不包括A.流感伤寒型 B.黄疸出血型 C.肺出血型
最新回复
(
0
)