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
小学二年级日常对话口语练习材料3
小学二年级日常对话口语练习材料1
二年级英语对话练习:你怎么了?(1)
小学英语情景对话(116):你叫什么名字?
小学英语情景对话(117):打扫公寓
小学英语情景对话(112):我们今天去农场
二年级英语对话练习:你怎么了?(2)
小学英语情景对话(111):睡觉的时间
小学二年级日常对话口语练习材料2
二年级英语口语练习:我很好。谢谢!
二年级英语口语练习:你几岁了?
二年级英语对话练习:你的英语怎么样?
小学英语情景对话(113):你们在做什么?
[OMG美语]怎么开始一段谈话
小学英语情景对话(109):我很高兴我是这样
小学英语情景对话(110):你在做什么?
二年级英语对话练习:喂,丹尼斯!
二年级英语口语练习:见到你很高兴
小学二年级英语口语对话练习
二年级英语对话练习:喂?
二年级英语口语练习:嗨,麦克 !
[OMG美语]看看我们的脸
小学英语情景对话(108):他更喜欢我
小学英语情景对话(107):野鸭子
小学二年级英语口语练习汇总
二年级英语口语练习:早上好!
小学英语情景对话(105):你通常吃完晚饭后看电视吗?
二年级英语口语练习:很高兴见到你
二年级英语对话练习:我感冒了
小学英语情景对话练习汇总
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英语教案 |
英语课件 |
英语试题 |
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