Southern Californians would love to find some way of knowing a month in advance whether a 11 earthquake will likely strike. One meteorologist suggests atmospheric pressure patterns might provide some 12 . Jerome Namias of the Scripps Institution of Oceanography in La Jolla, Calif. , proposed this 13 in 1988 when he reported that an unusually strong high-pressure system developed in the North Pacific before quakes struck southern California in 1986 and 1987. Now Namias has 14 expanded his analysis by studying the summers between 1947 and 1987.
From a 15 of all southern California earthquakes with magnitudes of 4- 5 or greater during that period, Namias 16 out the summers with many quakes and those with no quakes. His analysis of the meteorology during these summers shows that quakes were more 17 under a particular set of conditions; a stronger-than-normal North Pacific high pressure, a low-pressure ridge over the 18 interior. Summers with no quakes usually had a weak Pacific high and a poorly developed continental high, he reports in the Dec. 10 JOURNAL OF GEOPHYSICAL RESEARCH. Namias cannot 19 the apparent correlation between pressure and seismicity, but he 20 that variations in seafloor pressure or in sea-surface temperature might influence both the atmospheric pressure and the ground stress in California.
A. damaging B. idea C. trace D. greatly
E. picked F. clue G. explain H. forcefully
I. detects J. plan K. continental L. list
M. predicts N. managing O. likely
II. A 12. F 13. B 14. D 15. L 16. E 17. O 18. K 19. G 20. M
上一篇: 六级冲刺练习阅读(138)
下一篇: 六级冲刺练习阅读(129)
[2013秋]外研版(三起)四上《Unit 2 I’m going to do the high jump》ppt课件2
[2013秋]外研版(三起)四上《Unit 2 Happy Halloween》ppt课件
2014秋外研版(三起)四上Module 10《Unit 2 Merry Christmas》ppt课件1
2014秋外研版(三起)四上Module 2《Unit 1 She’s reading a book》ppt课件2
[2013秋]外研版(三起)四上《Unit 2 What’s the elephant doing》ppt课件3
2014秋外研版(三起)四上Module 1《Unit 1 Go straight on》ppt课件5
[2013秋]外研版(三起)四上《Unit 2 Merry Christmas》ppt课件
2014秋外研版(三起)四上Module 10《Unit 2 Merry Christmas》ppt课件3
2014秋外研版(三起)四上Module 10《Unit 1 We have a big family dinner》ppt课件3
[2013秋]外研版(三起)四上《Unit 2 How much is it》ppt课件1
2014秋外研版(三起)四上Module 2《Unit 2 What are you doing》ppt课件3
2014秋外研版(三起)四上Module 2《Unit 1 She’s reading a book》ppt课件4
[2013秋]外研版(三起)四上《Unit 2 How much is it》ppt课件2
2014秋外研版(三起)四上Module 10《Unit 1 We have a big family dinner》ppt课件2
[2013秋]外研版(三起)四上《Unit 2 I’m going to do the high jump》ppt课件3
[2013秋]外研版(三起)四上《Unit 2 Happy Halloween》ppt课件2
2014秋外研版(三起)四上Module 2《Unit 2 What are you doing》ppt课件1
[2013秋]外研版(三起)四上《Unit 2 I’m going to do the high jump》ppt课件
2014秋外研版(三起)四上Module 10《Unit 1 We have a big family dinner》ppt课件1
[2013秋]外研版(三起)四上《Unit 2 I’m going to do the high jump》ppt课件1
2014秋外研版(三起)四上Module 2《Unit 1 She’s reading a book》ppt课件1
[2013秋]外研版(三起)四上《Unit 2 How much is it》ppt课件
2014秋外研版(三起)四上Module 1《Unit 2 It’s at the station》ppt课件5
2014秋外研版(三起)四上Module 1《Unit 2 It’s at the station》ppt课件1
[2013秋]外研版(三起)四上《Unit 2 It’s at the station》ppt课件1
2014秋外研版(三起)四上Module 2《Unit 1 She’s reading a book》ppt课件5
2014秋外研版(三起)四上Module 1《Unit 2 It’s at the station》ppt课件4
2014秋外研版(三起)四上Module 10《Unit 2 Merry Christmas》ppt课件4
2014秋外研版(三起)四上Module 10《Unit 1 We have a big family dinner》ppt课件5
[2013秋]外研版(三起)四上《Unit 2 It’s at the station》ppt课件