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
2010-07-06
64
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 tome, 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 coning temblor 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, in the other hand, well-built structures generally did not collapse...
A recent report in science adds yet more anxiety about life on tile 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 quake’s 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 does 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 actor that may cause a series of events to occur.
C、An meaningful sign that indicates some would-be happenings.
D、An event that may have symbolic or significant nature.
答案
C
解析
本题为词义辨析题。考生可以在上下文中得到提示。首先提到了“so, finding one all-purpose warning sign is impossible.”紧接着下文提到,即使找到了a quake precursor,还是很难对所有危险的地震做出预警。可见,在这里precursor 意为a meaningful sign 比较合适。
转载请注明原文地址:https://kaotiyun.com/show/tnDd777K
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
Amongtheraftofbooks,articles,jokes,romanticcomedies,self-helpguidesandotherwritingsdiscussingmarriage,somefamil
Inpopulardiscussionsofemissions-rightstradingsystems,itiscommontomistakethesmokestacksforthetrees.Forexample,
Whoisthespeaker?
Withunfamiliarhumanbeings,whenweacknowledgetheirhumanness,wemustavoidstaringatthem,andyetwemustalsoavoidign
Youhavereadanarticleinamagazinewhichstates,"Withtheever-increasinghousepricesinbigmetropolises,itisbetterf
Somedoctorsaretakinganunusualnewapproachtocommunicatebetterwithpatients—theyareletting【C1】________readthenotest
Somedoctorsaretakinganunusualnewapproachtocommunicatebetterwithpatients—theyareletting【C1】________readthenotest
What’sthemaintopicofthemonologue?
Thepaintingwasprobablystolen______.WhichofthefollowingstatementsisTRUEaccordingtothepassage?
Whydidtheintelligencetestbecomeunpopularinthepastfewdecades?
随机试题
计算个体工商户生产经营所得的应纳税所得额时,不允许扣除的项目是( )。
唯一适用于各类工作的工作分析方法是()。
甲服装厂为增值税一般纳税人,2017年9月销售给乙企业300套服装,不含税价格为700元/套。由于乙企业购买数量较多,甲服装厂给予乙企业7折的优惠,并按原价开具了增值税专用发票,折扣额在同一张发票的“备注”栏注明。甲服装厂当月的销项税额为()元。
教育学的研究任务包括()。
根据皮亚杰和科尔伯格的研究,要改变或提高个体的道德水平,必须考虑其接受能力,遵循_________原则。
今天是张老师第一次上公开课,她穿着漂亮艳丽的新衣服提前来到教室,带来了很多直观教具,有实物、模型、图片。进教室后,她把这些教具放在讲台上或挂在黑板上,然后用彩色粉笔把黑板边缘装饰得格外醒目。开始上课了,张老师显得镇定自若,她先宣布了期中考试的成绩,并鼓励大
北回归线穿过的地域中,不包括()。
2011年全国共举办展览6830场,比2010年增加9.2%;展出面积为8120万平方米,比2010年增长8.5%;50人以上专业会议64.2万场,比2010年增加17.4%;万人以上节庆活动6.5万场,比2010年增长3%;出国境展览面积60万平方米,比
作为一名大学毕业生,如果能够具备较扎实的专业知识和基本的社会交往能力,或者是在就业市场上能够作出适合自己的选择,那么,就不可能找不到自己的位置。小王是一名大学毕业生,他没有找到工作职位,那么根据上述观点能够推出以下哪项结论?
Therearesuperstitionsattachedtonumbers;eventhoseancientGreeksbelievedthatallnumbersandtheirmultiplehavesomemy
最新回复
(
0
)