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
2023-10-31
25
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/3145851.html
相关试题推荐
ThereisaplaceinWashingtonthatsuppliespracticallyeverythingforleft-han
Tomisimmenselycuriousabouteverythingandaseagertofindtheanswersasif
Heorderedthateverything______keptinitsoriginalformbeforehisauntleft
Onfurtherexaminationitwasfoundthatthesignaturewasnot______.A、geneticB
Onfurtherexaminationitwasfoundthatthesignaturewasnot______.A、geneticB
"Everythingisgoingtobefine,"mymothersaid,______meonthehead.A、knocki
ThereisaplaceinWashingtonthatsuppliespracticallyeverythingforleft-han
[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
随机试题
Thedifferencebetweenaliquidandagasisobvious【C1】______thecondition
[originaltext]WhenAshleyBlackmonsatdownforherjobinterviewforamar
Theworld’sfirstinstitutionofitskindwasfoundedin1753,basedonthe
某公司接到通知,上级领导要在下午对该公司机房进行安全检查,为此公司做了如下安排:
如乳母能量摄入很低时,泌乳量可降至正常的( )。A.20%~30% B.
Thechangeinthatvillagewasmiraculou
一家在天津设立的高新技术企业,2018年实际支付合理的工资薪金总额200万元,实
下列关于军事思想、著作和政策的说法,错误的是:A.孙武的《孙子兵法》是中国现存最
下列个人贷款所用信贷资金完全不属于商业银行的是( )。A.商业性个人住房贷款
当出现基坑坍塌或人身伤亡事故时,应急响应必须由建设单位或工程总承包单位组织实施。
最新回复
(
0
)