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
考研
Although Consumers Union concedes that " no confirmed cases of harm to humans from manufactured nanoparticles have been reported
Although Consumers Union concedes that " no confirmed cases of harm to humans from manufactured nanoparticles have been reported
admin
2016-08-02
57
问题
Although Consumers Union concedes that " no confirmed cases of harm to humans from manufactured nanoparticles have been reported", it adds that "there is cause for concern based on several worrisome findings from the limited laboratory and animal research so far. " It worries that particles that are nontoxic at normal sizes may become toxic when nanosized; that these nanoparticles, which are already present in cosmetics and food, can more easily "enter the body and its vital organs, including the brain", than normal particles; and that nanomaterials will linger longer in the environment. All of this really comes down to pointing out that some particles are smaller than others. Size is not a reliable indicator of potential harm to human beings, and nature itself is filled with nanoparticles. But the default assumption of danger from the new is palpable.
Anti-nanotech sentiment has not been restricted to Consumers Union ’ s relatively short list of concerns. In France, groups of hundreds of protesters have rallied against even such benign manifestations of the technology as the carbon nanotubules that allow Parkinson’s sufferers to stop tremors by directing medicine to their own brains. In England members of a group called THRONG(The Heavenly Righteous Opposed to Nanotech Greed)have disrupted nanotech business conferences dressed as angels. In 2005 naked protesters appeared in front of an Eddie Bauer store in Chicago to condemn one of the more visible uses of nanotech: stain-resistant pants.
These nanopants employ billions of tiny whiskers to create a layer of air above the rest of the fabric, causing liquids to roll off easily. It’s not quite what Kurzweil and Crichton had in mind, nor is it "little robots in your pants", as CNN put it. But nanotechnology arguably embraces any item that incorporates engineering at the molecular level, including mundane products like this one.
Just as the nano label can be broadly applied to products for branding and attention-grabbing purposes, so too can critics use the label to condemn barely related developments by linking them to the(still hypothetical)problems of nanopollution and gray goo. But there’s a danger in thinking of nanotech only in god-or-goo terms. People at both extremes of the controversy fail to appreciate the humble, incremental, yet encouraging progress that nanotech researchers are making. And focusing on dramatic visions of nanotech heaven or hell may foster restrictions that delay or block innovations that can extend and improve our lives.
The author argues that nanotech is______.
选项
A、neither god nor devil
B、neither credible nor reliable
C、neither inferior nor superior
D、neither harmful nor beneficial
答案
A
解析
根据最后一段中的“But there’s a danger in thinking of nanotech only in god—or—goo terms.People at both extremes of the controversy fail to appreciate the...progress that nanotech researchersare making”,A应为答案。
转载请注明原文地址:https://kaotiyun.com/show/pEoZ777K
0
考研英语一
相关试题推荐
Youarewhatyoueat,orsothesayinggoes.ButRichardWrangham,ofHarvardUniversity,believesthatthisistrueinamorep
AlisonPrestonoftheUniversityofTexasatAustin’sCenterforLearningandMemoryexplains:Ashort-termmemory’sconversion
BankruptcyratesintheU.S.havebeengrowingformorethantwodecadesdespitegenerallyrisinglevelsofpersonalincome.The
Theclean-energybusinessisturningintothenextbiginvestmentboom,inwhichrisksarelightlyignored.Untilrecently,reca
WithJapan’swelfaresystembucklingunderthedemandsofanageingsociety,theworld’soldestmanapologizedyesterdayforhis
Partlyduetoahistoricaldevelopmentmarkedbyworldwidecolonialism,urbanization,andglobalization,inthecourseofthisc
Athleteswhocheatbyinjectingthemselveswithstoredsuppliesoftheirownbloodmightsoonbecaughtout.Arevealingtrailo
Consumersandproducersobviouslymakedecisionsthatmoldtheeconomy,butthereisathirdmajor【C1】______toconsidertherole
Aperson’shomeisasmuchareflectionofhispersonalityastheclotheshewears,thefoodheeatsandthefriendswithwhomh
Doctorshavetreatedthefirstreportedcaseof"Internetaddictiondisorder"broughtonbyexcessiveuseofGoogleGlass.I
随机试题
女孩3岁,发热伴咳嗽3~4天,今出皮疹,外院拟诊药物疹,口服阿司咪唑,回家后病情变化,咳嗽加剧,来院就诊。体检:体温39℃,气急,鼻煽动,唇周青紫,两结膜红,口腔黏膜粗糙,心率160次/分,心音低钝,两肺闻及细湿啰音,肝肋下3.5cm,剑下4cm,头躯干可
求二重积分[1+x3一(x2+y2)]dxdy,其中D为x2+y2≤2ay.
某37岁孕妇,妊娠36周检查发现妊娠期高血压疾病,2小时前突然发生持续性腹痛伴阴道少量流血,面色苍白。首先考虑为
根据《合同法》,“数据电文”包括( )。
在“抱娃娃”游戏中,一开始,参加者把自己当成娃娃的妈妈,耐心地喂饭,但当他转身去拿“饭”时,发现其他小朋友正在沙坑里搭起一座“小花园”,他的注意便一下子转到“小花园”而走到沙坑去玩了。
有关犯罪预备,错误的说法是()。
Nowadays,oursocietyisbeingreshapedbyinformationtechnologies—computers,telecommunicationsnetworks,andotherdigitalsy
StrategiesforWritingaLiteratureReviewAliteraturereviewdiscussespublishedinformationinaparticularsubjectarea.
PartⅡReadingComprehension(SkimmingandScanning)Directions:Inthispart,youwillhave15minutestogooverthepassageq
Asateacher,youshouldn’tbe______toanyofthekids,theyshouldshareequalcare.
最新回复
(
0
)