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
101
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、repairs
B、controls
C、finishes
D、disappears
答案
D
解析
依据语境,此处应该是条件改变后红色消失。故选D。
转载请注明原文地址:https://kaotiyun.com/show/j2Qd777K
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
ActiveinOldAgeKeepsPeopleMobilePeopleover70whoaren’tactivearemorelikelytodevelopproblemswalkingorclimbi
ActiveinOldAgeKeepsPeopleMobilePeopleover70whoaren’tactivearemorelikelytodevelopproblemswalkingorclimbi
A.BreakthenewsascalmlyaspossibletochildrenB.BreakthenewsatyourownpaceC.Sharethegoodnewswithyourfriends
A.BreakthenewsascalmlyaspossibletochildrenB.BreakthenewsatyourownpaceC.Sharethegoodnewswithyourfriends
A.BreakthenewsascalmlyaspossibletochildrenB.BreakthenewsatyourownpaceC.Sharethegoodnewswithyourfriends
Thechairmanproposedthatweshouldstopthemeeting.
Peoplearoundtheglobehittheheightoftheirmiseryanddepressionin(51)age,anewinternationalstudysuggests.The
Ienjoyedtheplay--ithadacleverplotandveryfunnydialogues.
Aliceisafascinatinggirl.
随机试题
创伤后或手术中止血带使用不当引起最严重后果是
小儿暑温邪在卫气证,若暑邪偏在表,用方是小儿暑温邪在卫气证,若腑气不通者,用方是
张某是甲房地产经纪机构(以下简称甲机构)的房地产经纪人,某日在互联网上看到王某出售本市一套三居室住房的信息,标价115万元,他随即打电话咨询相关情况,并告之自己是甲机构经纪人,可以帮王某找买家。房主王某在电话中应允张某可以为其代找买家。次日,张某便约自己的
已知电路如图所示,若使用叠加原理求解图中电流源的端电压U,正确的方法是:
下列关于企业合并以外的方式取得的长期股权投资的会计处理中,正确的有()。
优质流动性资产分析包括()。
(2011年浙江.72)下列关于财政政策和货币政策的表述不正确的是()。
阅读下文,完成下列5题。雾茅盾①雾遮没了正对着后窗的一带山峰。②我还不知道这些山峰叫什么名儿。我来此的第一夜就看见那最高的一座山
能够将组合框Combo1中最后一个数据项删除的语句为( )。
A、Comparedthebilingualswiththemonolinguals.B、PutAmericanbabiesinChinesefamilies.C、ExposedAmericanbabiestoanewl
最新回复
(
0
)