Everyone has heard of the San Andreas fault , which constantly threatens California and the West Coast with earthquakes. But how many people know about the equally serious New Madrid fault in Missouri? Between December of 1811 and February of 1812, three major earthquakes occurred, all centered around the town of New Madrid, Missouri, on the Mississippi River. Property damage was severe. Buildings in the area were almost destroyed. Whole forests fell at once, and huge cracks opened in the ground, allowing smell of sulfurto filter upward. The Mississippi River itself completely changed character, developing sudden rapids and whirlpools. Several times it changed its course, and once, according to some observers, it actually appeared to run backwards.Few people were killed in the New Marid earthquakes, probably simply because few people lived in the area in 1811; but the severity of the earthquakes are shown by the fact that the shock waves rang bells in church towers in Charleston, South Carolina, on the coast. Buildings shook in New York City, and clocks wer stopped in Washington, D.C. Scientists now know that America s two major faults are essentially different. The San Andreas is a horizontal boundary between two major land masses that are slowly moving in opposite directions. California earthquakes result when the movement of these two masses suddenly lurches forward. The New Madrid fault, on the other hand, is a vertical fault; at some points, possibly hundreds of millions of years ago, rock was pushed up toward the surface, probably by volcanoes under the surface. Suddenly, the volcanoes cooled and the rock collapsed, leaving huge cracks. Even now, the rock continues to settle downwards, and sudden sinking motions trigger earthquakes in the region. The fault itself, a large crack in this layer of rock, with dozens of other cracks that split off from it, extends from northeastArkansas through Missouri and into southern lllinois. Scientists who have studied the New Madrid fault say there have been numerous smaller quakes in the area since 1811; these smaller quakes indicate that larger ones are probably coming, but the scientists say have no method of predictingwhen a large earthquake will occur. 1. This passage is mainly about . A)the New Madrid fault in Missouri B)the San Andreas and the New Madrid faults C)the causes of faults D)current scientific knowledge about faults 2. The New Madrid fault is . A) a horizontal fault B) a vertical fault C) a more serious fault than the San Andreas fault D) responsible for forming the Mississippi River 3. We may conclude from the passage that . A) it is probably as dangerous to live in Missouri as in California B) the New Madrid fault will eventually develop a mountain range in Missouri C) California will become an island in future D) A big earthquake will occur to California soon 4. This passage implies that . A) horizontal faults are more dangerous than vertical faults. B) Vertical faults are more dangerous than horizontal faults C) Earthquakes occur only around fault areas D) California will break into pieces by an eventual earthquake 5. As used in the first sentence of the fourth paragraph, the word essentially means . A) greatly C) basically B) extremely D) necessarily Answer 1.B 2.B 3.A 4.C 5.C
2018广州越秀真光中九上9月月考英语( )
2020届深圳市皇御苑学校高二英语上学期期中试卷
镇江市索普中学2019-2020学年初三期中英语
2019学年浙江温州第十二中学初三英语期中卷
福建龙岩第五中学2019-2020学年期中初三英语
安徽2018-2019九上月考一英语试题答案
河南新乡第七中2018九上第一次月考
2020届辽宁省北票三中高二英语上学期期中试卷
广西南宁马山民族中上第一次月考答案
2020届辽宁省北票三中高二英语上学期期中试卷答案
浙江温州苍南龙港第一中上第一次月考( )
2020届吉林省长春一五一中高二英语上学期期中试卷答案
2020届吉林省长春一五一中高二英语上学期期中试卷
江苏无锡江阴暨阳中九10月月考英语
2020届吉林省蛟河一中高二英语上学期期中试卷
2020届福建省福州一中高二英语上学期期中试卷答案
2020届吉林省蛟河一中高二英语上学期期中试卷答案
2020届四川省富顺二中高二英语上学期期中试卷
2019-2020福建厦门同安一中九年级上英语期中试卷
南京二十九中天润城分校2020届期中初三英语试卷
2018陕西榆林榆阳马合中九上第一次月考
贵州毕节梁才学校2020届初三期中英语试题
2020届云南省禄劝一中高二英语上学期期中试卷
2020届广西逸仙中学高二英语上学期期中试卷
江苏无锡江阴暨阳中九10月月考英语答案
2020届江西师大附中高二英语上学期期中试卷
广西南宁马山民族中上第一次月考
西安第46中学2019-2020学年期中初三英语卷
湖北武汉江岸区2019-2020学年期中初三英语试卷
(新题型)2019郑州市金水区为民中学期中考试
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |