Like most parents, geologist Brain Atwater worries about his daughters 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 earthquakeswith magnitudes of 8 or higherdo indeed 16 this region, a growing number consider such shocks a serious possibility. Whats 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 regions 17 centers with enough force to make the recent San Francisco area damage seem 18 in comparison. I think its 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. displayedE. relatively F. attends G. type H. strikeI. structure J. participates K. excessive L. mildM. disturbing N. population 0. presented II. F 12. C 13. G 14. M 15. B 16. H 17. N 18. L 19. O 20. A
鹅妈妈童谣:星星闪,星星亮
一年级英语口语绝佳句型100句(1)
一年级英语学习口语教程:Eight
小学一年级英语口语练习
小学一年级英语口语练习:问答2
阶梯英语歌谣:苹果橙子番茄土豆
鹅妈妈童谣:月亮上的男人
鹅妈妈童谣系列集锦
阶梯英语歌谣:盒子里有什么?
一年级英语学习口语教程:Six
阶梯英语歌谣:姐妹,兄弟,爸爸,妈妈
一年级英语口语绝佳句型100句(3)
阶梯英语歌谣:我跳得很高
阶梯英语歌谣:大拇指在哪里?
读迷你小对话轻松学英语口语:怯懦的
阶梯英语歌谣:今天来聚会吧
一年级英语学习口语教程:Seven
一年级英语学习口语教程:Four
[OMG美语]来杯咖啡吧 coffee
阶梯英语歌谣:15只小鸟
阶梯英语歌谣:写说拼擦
鹅妈妈童谣:到巴比伦有多少公里
一年级英语口语绝佳句型100句(2)
阶梯英语歌谣:对不起,我们迟到了
鹅妈妈童谣:摇篮摇啊摇,宝贝儿
鹅妈妈童谣:蛋头先生的儿歌
一年级英语学习口语教程:Two
小学一年级英语口语测试题
阶梯英语歌谣:你是我的阳光
小学英语口语:Come on
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |