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
38
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、why
B、how
C、what
D、where
答案
C
解析
本题考查宾语从句应用,句中从句缺少宾语。故选C。
转载请注明原文地址:https://kaotiyun.com/show/y2Qd777K
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
SleeplessnessInsomniaorsleeplessnessisacommoncomplaintofwomenastheyenterintomenopause.Insomniameanshavingt
FriendlyRelationswiththePeopleAround1Youdependonallthepeoplecloselyaroundtogiveyouthewarmfeelingofbelongin
SeekHealthandWellness1Whetheryouarebusystudyingorstartingclerkship,itisabsolutelyessentialtomaintainhealthan
HealthyFoodStreetsellers,particularlyindevelopingcountries,supplylargeamountsoffood(51)peopleonlowincomes.Thi
Thetraditionalpaintingsare(exhibited)onthesecondfloor.
Parentsshouldrealizedthat"exampleisbetterthanprecept".
Mom’sTrafficAccidentsTheybicyclingcrazecameinwhenwewerejustaboutattherightagetoenjoyit.Atfirsteven"sa
Sleepproblemscanseriouslyaffectone’squalityoflife."Sleepfragmentation"referstoamarkedlackof"REM"sleep.
Thetelephonesystemisnolongeroperative.
随机试题
CT滤过器作用的关键在于
《突发公共卫生事件应急条例》规定,医疗卫生机构应当对传染病做到
无眩晕、无听力障碍和肌力完好的患者,出现右上肢指鼻试验不正确和轮替动作差、右下肢跟膝胫试验差。病损部位在
先张法张拉台座应具有足够的强度和刚度,其抗倾覆安全系数和抗滑移安全系数分别不应小于()。
机动车辆保险的附加险有()。
甲公司和乙公司为非关联方。2×17年5月1日,甲公司按每股5元的价格增发每股面值为1元的普通股股票2000万股,并以此为对价取得乙公司70%的股权,能够对乙公司实施控制。甲公司另以银行存款支付审计费、评估费等共计20万元。乙公司2×17年5月1日可辨认净资
在国际收支平衡表中,当收入大于支出时,我们称之为______;反之当支出大于收入时,我们称之为______。
该心理医生所采用的心理治疗方法是()。实施该心理治疗方法后,针对王老太的抱怨,新的行为结果是()。
当告诉被催眠的受试人说他们是聋子,然后问他们是否能听到催眠师说的话时,他们回答说“听不到”。一些理论家通过证明,被催眠的受试人的自身被分隔为单独的各部分,并且聋的部分与回答的部分是分隔开的,来试图解释这个结果。以下哪项质疑将指出以上所描述的尝试型的
很强的电流会通过伴随电流产生的电磁场而使在其附近生活和工作的人更容易患癌症吗?电话线工人每天都工作在这样的电流旁边,他们可以作为例子。实验结果表明,他们患脑癌的概率更大。因此,电磁场引发癌症的假设是成立的。以下哪项最为恰当地指出了上述论证所存在的
最新回复
(
0
)