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
Seeing Red Means Danger Ahead The color red often means danger-and by paying attention,accidents can be prevented.In the futu
Seeing Red Means Danger Ahead The color red often means danger-and by paying attention,accidents can be prevented.In the futu
admin
2011-01-10
32
问题
Seeing Red Means Danger Ahead
The color red often means danger-and by paying attention,accidents can be prevented.In the future,the color red also may help【51】______danger at construction sites.Thanks to new work by engineers,bridge supports-or【52】______kinds of materials-could one day contain a color-changing material.It will turn red【53】______a structure collapses or falls apart.
The secret【54】______the color-changing material is a particular type of molecule(分子).A molecule is a group of atoms(原子)held together by chemical bonds.Molecules come【55】______all shapes and sizes,and make up【56】______you can see,touch or feel.How a molecule behaves depends on【57】______kinds of atoms it contains,and how they’re held together.
When a polymer(聚合物)containing a color-changing molecule called a mechanophore(机械响应性聚合物)is about to break,it produces a【58】______.When a polymer with mechanophore molecules becomes“injured”or【59】______,one of the mechanophore bonds【60】______and the material turns red.“It’s a really simple detection method,”says Nancy Sottos,one of the scientists who worked on the project.Sottos and her team tested the color-changing polymers in their lab.The test【61】______ proved encouraging.
There is a way to get rid of the red color:light.When a bright light is shone on the mechanophore, the broken bond is fixed-and the red color【62】______.This“self-healing”may be a problem for engineers.They need to use the color-changer in big construction projects that will be【63】______,in sunlight.And sunlight will make the mechanophore’s warning system【64】______.
Sottos and her fellow scientists still have【65】______work to do before the color-changing molecules can be used outside the lab.
选项
A、on
B、behind
C、under
D、down
答案
B
解析
此处考查“……背后的秘密”,behind表示“后面的”,故选B。
转载请注明原文地址:https://kaotiyun.com/show/w2Qd777K
本试题收录于:
职称英语理工类C级题库职称英语分类
0
职称英语理工类C级
职称英语
相关试题推荐
Common-coldSenseYoucan’tbeatit,butyoudon’thavetojoinit.Maybeitgotthename"commoncold"becauseit’smorec
Itisprudenttostartanyexerciseprogramgraduallyatfirst.
Thepresidentproposedthatweshouldbringthemeetingtoaclose.
Thetiesymbolizesallofthefollowingexcept______.WhichofthefollowingisNOTasocialoccasion?
People40yearsofagetodayseemtobeasyoungas______.In2000,middleagefortheaverageGermanoccurred______.
HealthyFoodStreetsellers,particularlyindevelopingcountries,supplylargeamountsoffood(51)peopleonlowincomes.Thi
HealthyFoodStreetsellers,particularlyindevelopingcountries,supplylargeamountsoffood(51)peopleonlowincomes.Thi
1.Cancerisadiseaseinwhichcellsmultiplywithoutcontrol,destroyhealthytissue,andendangerlife.About100kindsofca
Mom’sTrafficAccidentsTheybicyclingcrazecameinwhenwewerejustaboutattherightagetoenjoyit.Atfirsteven"sa
OnlyinFebruaryshouldattentionbepaidtochildren’soralhealth.Somechildrenhaveneverseenadentistbeforestartingsc
随机试题
下列对应错误的一项是:
张经理在公司大会上宣布:“此次提出的方案得到一致赞同,全体通过。”会后,小陈对此事进行了调查,发现张经理所言不是事实。如果小陈的发现为真,下面必定为真的是()
抗利尿激素和醛固酮的作用部位是()
多发性神经纤维瘤病的描述错误的是
有一群20龄小鸡发病,最初有些鸡啄自己的泄殖腔。病鸡羽毛蓬松,采食减少,常打堆在一起,精神委靡,随即出现腹泻,排出白色黏稠和水样稀便,泄殖腔周围的羽毛被粪便污染。严重者鸡头垂地,闭眼呈昏睡状态。在后期体温低于正常,严重脱水,极度虚弱而死亡。该病初步诊断为(
进行软硬件配置时,应在预算编制中考虑()等费用。
进口货物在海关放行前已遭受损坏或损失的,应当由海关审定后,方可减征和免征关税。
某种商品的供给曲线的移动是由于()。
随着社会发展的加快,外来词在现代汉语中的地位和作用也越来越重要,这值得我们重视。含有音译成分的外来词主要有:(一)纯音译,如布丁、__________;(二)半音半意译,如千瓦、__________;(三)音译加类名,如卡片、__________;(四)音
Ilaoubliéd’_____sonmanteauenpartant.
最新回复
(
0
)