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
2010-01-07
41
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 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 tremor is mild or a killer. Earthquake formation can be triggered by many factors, says Hiroo Kanamori, a seismologist 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 tremor, 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.
From what the author said in Para. 1, it can be inferred that ______ .
选项
A、scientists can never be able to predict the coming of earthquakes
B、the existing power on predicting earthquakes is somewhat exaggerated
C、quite a lot of scientific assertions are groundless
D、earthquake predictions are beyond the reach of scientists
答案
B
解析
从第一段最后一句可以看出。
转载请注明原文地址:https://kaotiyun.com/show/ruPd777K
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
Ascientistoncesaid,"Ihaveconcludedthattheearthisbeingvisitedbyintelligentlycontrolledvehiclesfromouterspace."
Ascientistoncesaid,"Ihaveconcludedthattheearthisbeingvisitedbyintelligentlycontrolledvehiclesfromouterspace."
SomepeopleusedtosaythatDadhadsomanychildrenthathecouldn’tkeeptrackofthem.Dadhimselfusedto【1】astoryabouto
SomepeopleusedtosaythatDadhadsomanychildrenthathecouldn’tkeeptrackofthem.Dadhimselfusedto【1】astoryabouto
SomepeopleusedtosaythatDadhadsomanychildrenthathecouldn’tkeeptrackofthem.Dadhimselfusedto【1】astoryabouto
Couldthebadolddaysofeconomicdeclinebeabouttoreturn?SinceOPECagreedtosupply-cutsinMarch,thepriceofcrudeoil
Couldthebadolddaysofeconomicdeclinebeabouttoreturn?SinceOPECagreedtosupply-cutsinMarch,thepriceofcrudeoil
Stopfighting.
Couldthebadolddaysofeconomicdeclinebeabouttoreturn?SinceOPECagreedtosupply-cutsinMarch,thepriceofcrudeoil
随机试题
施工预算和施工图预算虽仅一字之差,但区别较大,主要有()。
(2020年昌邑)根据言语的描述或图样的示意,在人脑中产生相应的新形象的过程称为()
Ifsustainablecompetitiveadvantagedependsonworkforceskills,Americanfirmshaveaproblem.Humanresourcemanagementisn
哲学是()
横断面研究纵向研究
活血祛瘀药的适应证不包括
污泥进行机械脱水之前要进行预处理,其主要目的是改善和提高污泥的脱水性能。下列方法中哪种是最常用的污泥预处理方法?()
加快工程咨询理论方法和技术创新的要求不包括()。
以下属于个别督导优点的是( )。
Ω是由曲面z=xy与平面y=x,x=1和x=0所围成的闭区域,则xy2z3dxdydz=_________。
最新回复
(
0
)