Like most parents, geologist Brain Atwater worries about his daughter s safety. But these days, he has an unusual concern; The public school she 11 in Seattle has unreinforced brick walls, a 12 being easy to collapse during earthquakes. The same 13 of walls crushed hundreds of thousands of people during the 1976 Tangshan quake in China.
A decade ago, Atwater would have paid little notice to schoolroom walls. But over the last several years, he and other scientists have found 14 signs that the Pacific Northwest has experienced giant quakes in the distant past and that the area may be headed for a destructive shock in the near future.
At a meeting of the American Geophysical Union in December, researchers discussed the 15 uncovered evidence of quake potential in the Pacific Northwest. While some remain unconvinced that huge earthquakes with magnitudes of 8 or higher do indeed 16 this region, a growing number consider such shocks a serious possibility.
What s worrisome, they say, is that northwestern cities such as Portland, Seattle and Vancouver have not prepared for earthquakes of this magnitude, which could shake the region s 17 centers with enough force to make the recent San Francisco area damage seem 18 in comparison.
I think it s quite true to say that nothing has really been designed with one of these earthquakes in mind, says seismologist Paul Somerville of Woodward. At the meeting, Somerville and his colleagues 19 estimates of the degree of shaking. Portland and Seattle would suffer during such a 20 earthquake. A. massive
B.
recently
C.
construction
D.
displayed
E. relatively
F.
attends
G.
type
H.
strike
I. structure
J.
participates
K.
excessive
L.
mild
M. disturbing
N.
population
0.
presented
中考英语知识点:易混词复习--increase grow add
中考英语知识点--二十个易拼错的单词
中考英语词汇练习--通过幽默句子学非谓语动词
中考英语复习资料--初中英语常用同义词辨析(86)
北京海淀初三上学期英语期末复习要点整理
中考英语复习资料--初中英语常用同义词辨析(74)
中考英语知识点--初中英语常用同义词辨析(5)
中考英语复习资料--初中英语常用同义词辨析(94)
中考英语复习资料--初中英语常用同义词辨析(97)
初中英语--“顺便”在英文中的表达方法
中考英语知识点--初中英语必背词汇总结(三)
中考英语知识点--初中英语必背词汇总结(二)
中考英语总复习:形容词副词的用法
初三上英语期末复习填空训练(外研版)--Module 1
新目标版中考必考词汇大全--七年级(上)第一单元
中考英语复习资料--初中英语常用同义词辨析(35)
中考英语完形填空考前强化--A student
中考英语复习资料--初中英语常用同义词辨析(72)
中考英语知识点--初中英语常用同义词辨析(100)
中考英语复习资料--初中英语常用必备词组(二)
中考英语复习资料--初中英语常用同义词辨析(96)
中考英语知识点--初中英语常用必备词组(四)
中考英语完形填空考前强化--man’s history
中考英语知识点--初中英语常用同义词辨析(2)
中考英语复习资料--初中英语常用同义词辨析(85)
中考英语:易混淆拼错英文单词rip VS ripe
寒假英语总动员--不可忽略特殊数字表示法
寒假英语总动员--不可忽略数词基本用法
中考英语复习资料--初中英语常用同义词辨析(89)
中考英语易混淆拼错英文单词--floor VS flour
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |