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
Humans are forever forgetting that they can’t control nature. Exactly 20 years ago, a Time magazine cover story announced that “
Humans are forever forgetting that they can’t control nature. Exactly 20 years ago, a Time magazine cover story announced that “
admin
2010-06-30
26
问题
Humans are forever forgetting that they can’t control nature. Exactly 20 years ago, a Time magazine cover story announced that “scientists are on the verge of being able to predict the time , place and even the size of earthquakes.” The people of quake-ravaged Kobe (神户)learned last week how wrong that assertion was.
None of the methods conceived two decades ago has yet to discover a uniform warning signal that preceded all quakes, let alone any sign that would tell whether the coming temblor (震动) is mild or a killer. Earthquake formation can be triggered by many factors, says Hiroo Kanamori, formation can be triggered by many factors, says Hiroo Kanamori, a seismologist (地震学家)at the California Institute of Technology, So, finding one all - purpose warning sign is impossible. One reason: Quakes start deep in the earth, so scientists can’t study them directly . If a quake precursor were found, it would still be impossible to warn humans in advance of all dangerous quakes, Places like Japan and California are riddled with hundreds, if not thousands, of minor faults. Prediction would be less important if scientists could easily build structures to withstand tremors, While seismic engineering has improved dramatically in the past 10 to 15 years, every new quake reveals unexpected weaknesses in “quake – resistant” structures, says Terry Tullis, a geophysicist at Brown University. In Kobe, for example, a highway that opened only last year was damaged. In the Northridge earthquake, on the other hand, well-built structures generally did not collapse.
A recent report in science adds yet more anxiety about life on the faulty lines. Researchers ran computer simulations to see how quake-resistant buildings would fare in a moderate- size temblor, taking into account that much of a quakes energy travels in a large “pulse” of focused shaking. The results: Both steel-frame buildings and buildings that sit on insulating rubber pads suffered severe damage.
More research will help experts design stronger structures and possibly find quake precursors. But it is still a certainty that the next earthquakes will prove once again that every fault cannot be monitored and every highway cannot be completely quake - proofed.
What docs the word "precursor" in the context in Para. 3 mean?
选项
A、A man that may come before the happening of an earthquake.
B、The leading factor that may cause a series of events to occur.
C、Any meaningful sign that indicates some would- be happenings.
D、An event that may have symbolic or significant nature.
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/EOPd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
WhichofthefollowingistheacceptabletablemannerinBritain?
Thefollowingpassageisdividedintothreesections.Youareaskedtofindoutinwhichsectionsthe10statementsarediscusse
Thespeechismainlyabouttheorganizationofthecompany.
RecentsurveysshowthatJapaneseyouthhavebecomea"MeGeneration"thatrejectstraditionalvalues."Around1980manyJap
RecentsurveysshowthatJapaneseyouthhavebecomea"MeGeneration"thatrejectstraditionalvalues."Around1980manyJap
WhichofthefollowingstatementsaboutthetelephoneofthefutureisNOTtrue?
Forachild,happinesshasamagicalnature.Iremembermakinghide-outsinnewly-cuthay,playingcopsandrobbersinthewoods
DaffodilsbloomandchocolateeggsmeltasthelongEasterweekenddrawsnear.Alongsidesuchpleasuresisanother,equallyseas
AccordingtotheAmericanAcademyofDermatology,anestimated10to50millionpeopleinthiscountryhaveanallergicreaction
Whatisthetelephonecallabout?
随机试题
房地产经纪机构向房地产交易主体宣传相关法律法规,解说交易程序及相关规定,警示不规范行为及后果,其作用是()。[2010年考试真题]
为了反映企业库存原材料成本的增减变化及其结存情况,应设置()账户。
下列有关支票的表述中,正确的是()。
某市以媒体融合为基础,坚持“黏着受众走,跟着民生跑”,运用“新闻+政务”“新闻+服务”“新闻+电商”等模式,推动互联网、大数据和各部门、各行业、各领域的跨界融合。该市的做法旨在()。①以互联网媒体替代传统媒体②打造主流阵地,更好引导群众③创新
公安机关民主职能的实质就是巩固共产党的执政地位,确保国家政权的安全。()
下列关于纯音掩蔽的描述中,不正确的是
WhichofthefollowingisNOTadistinctivefeatureofhumanlanguage?
Ifyou______morethanaweektotakecareofyourbabyinthehospital,askthetopmanagerforaleave.
PASSAGEFOUR
Whenwasthecustomersurveyconducted?Itwasconducted______.
最新回复
(
0
)