张班 GDOU-B-11-302
广东海洋大学2015级博士研究生入学英语考试试题 题 号 一 二 三 四 五 总分 阅卷教师 级： 姓密名： 学号封： 试题线共 页 加白纸 各题分数 30 15 10 30 15 实得分数 Part Ⅰ: Reading Comprehension (30%)
Direction: In this part, there are four passages. Read each passage carefully, and then
choose the best answer from the four choices given below. Passage 1
Humans are forever forgetting that they can't control nature. Exactly 20 years ago, a Time magazine cover story announced that \are on the verge of being able to predict the time, place and even the size of earthquakes\learned last week how wrong that assertion was.
None of the methods raised two decades ago have succeeded. Even now, scientists have yet to discover a uniform warning signal that precedes all quakes, let alone any sign that would tell whether the coming quake 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 filled with hundreds, if not thousands, of minor faults . It is impossible to place monitoring instruments on all of them. And these inconspicuous sites can be just as deadly as their better-known cousins like the San Andreas . Both the Kobe and the 1994 Northridge quakes occurred on small 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 \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. But engineers have since found hidden problems in 120 steel-frame buildings that survived. Such structures are supposed to sway with the earth rather than crumple. They may have swayed, but the quake also unexpectedly weakened the joints in their steel skeletons. If the shaking had been longer or stronger, the buildings might have collapsed. A recent report in Science adds yet more anxiety about life on the fault 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 quake's energy travels in a large \
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2015年广东海洋大学博士英语考试试题考博真题试题
