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
45
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、inside
B、beside
C、outside
D、above
答案
C
解析
此处是说,他们需要把这种变色装置用到大型的建筑项目上,用在“外面”,在阳光下。故选C。
转载请注明原文地址:https://kaotiyun.com/show/k2Qd777K
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
DangersAwaitBabieswithAltitudeWomenwholiveintheworld’shighestcommunitiestendtogivebirthtounderweightbabie
Almosteveryoneatthemeetinghasdifferentviews.
FriendlyRelationswiththePeopleAround1Youdependonallthepeoplecloselyaroundtogiveyouthewarmfeelingofbelongin
FriendlyRelationswiththePeopleAround1Youdependonallthepeoplecloselyaroundtogiveyouthewarmfeelingofbelongin
WalkingBarefootCanHelpPreventSomeInjuriesWalkingbarefoothelpstoimprovebalance,postureandpreventcommonfootin
WalkingBarefootCanHelpPreventSomeInjuriesWalkingbarefoothelpstoimprovebalance,postureandpreventcommonfootin
WalkingBarefootCanHelpPreventSomeInjuriesWalkingbarefoothelpstoimprovebalance,postureandpreventcommonfootin
Jensenisadangerousman,andcanbeverybrutal.
ActiveinOldAgeKeepsPeopleMobilePeopleover70whoaren’tactivearemorelikelytodevelopproblemswalkingorclimbi
A.alonglifeexpectancyformostpeopleB.artistsareadroitindealingwiththeirpaintingsubjectC.engageinthemedica
随机试题
按工作过程的次序,检验方式可分为()
A.滑膜炎B.肌腱附着点炎C.关节软骨变性D.小血管炎系统性红斑狼疮的病理特征是
下列关于球后溃疡的叙述,错误的是
投资效益有宏观和微观之分,宏观效益是从()来考察的。
对于易发事故和事故危害大的行业和生产系统、部位、装置、设备等应进行强制性检查。按照国家有关规定要求,对于非矿山企业,下列检查项目中,须进行强制性检查的有()。
与长期债务筹资相比,短期债务筹资的特点有()。
下列不属于注意的品质特征的是()。
以“伟大与平凡"为题演讲。
人民军队的生命线是
Thedreamofpersonalisedflightisstillvividinthemindsofmanyinventors,somedevelopingcycle-poweredcraft,others【C1】_
最新回复
(
0
)