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1、 1 单元综合测评单元综合测评 五五 阅读理解 共 15 小题 每小题 2 分 满分 30 分 A The year is 2094 It has been announced that a comet 彗星 is heading towards the Earth Most of it will miss our planet but two pieces will probably hit the southern half of the Earth On 17 July a piece four kilometers wide enters the Earth s atmosphere
2、with a massive explosion About half of the piece is destroyed but the remaining part hits the South Atlantic at 200 times the speed of sound The sea boils and a huge hole is made in the sea bed Huge waves are created and spread outwards from the hole The wall of water a kilometer high rushes towards
3、 southern Africa at 800 kilometers an hour Cities on the African coast are totally destroyed and millions of people are drowned Before the waves reach South America the second piece of the comet lands in Argentina Earthquakes and volcanoes are set off in the Andes Mountains The shock waves move nort
4、h into California and all around the Pacific Ocean The cities of Los Angeles San Francisco and Tokyo are completely destroyed by earthquakes Millions of people in the southern half of the earth are already dead but the north won t escape for long Because of the explosions the sun is hidden by clouds
5、 of dust temperatures around the world fall to almost zero Crops are ruined The sun won t be seen again for many years Wars break out as countries fight for food A year later no more than 10 million people remain alive Could it really happen In fact it has already happened more than once in the 2 hi
6、story of the Earth The dinosaurs were on the Earth for over 160 million years Then 65 million years ago they suddenly disappeared Many scientists believe that the Earth was hit by a piece of object in space The dinosaurs couldn t live through the cold climate that followed and they died out Will we
7、meet the same end 1 What is described in the passage A A historic discovery B A research on space C A scientific adventure D An event of imagination 解析 推理判断题 根据短文首句和最后一句结合短文内容可知 本文 讲述的是一个想象出来的事件 故选 D 项 答案 D 2 When the first piece hits the South Atlantic it causes A huge waves B a hurricane C an eart
8、hquake D an Earth explosion 解析 细节理解题 由第二段第二 三 四句可知 当第一块碎片撞击 南大西洋时 海水会沸腾 并引起巨大的海浪 故 A 项符合题意 答案 A 3 Why can t the northern half of the Earth escape for long A Because the land is covered with water B Because wars break out among countries C Because people there can not live at the temperature of zero
9、D Because the light and heat from the sun can not reach the Earth 解析 细节理解题 根据第三段最后几句可知 由于太阳被遮住 地球 温度过低 农作物被毁 北半球也坚持不了多长时间 故选 D 项 答案 D 4 By giving the example of dinosaurs the author tries to prove A the human beings will die out in 2094 B animals could not live in the cold climate C the Earth could
10、be hit by other objects in space 3 D what happened 65 million years ago was an invented story 解析 推理判断题 由最后一段倒数第三句可知 地球有被太空中其他 物体撞击的可能 故选 D 项 答案 C B Edmund Halley was an English scientist who lived over 200 years ago He studied the observations of comets 彗星 which other scientists had made The orbit o
11、f one particular comet was a very difficult mathematical problem He could not figure it out Neither could other scientists who dealt with such problems However Halley had a friend named Isaac Newton who was a brilliant mathematician Newton thought he had already worked out the problem but he could n
12、ot find the paper on which he had done it He told Halley that the orbit of a comet had the shape of an ellipse 椭圆形 Now Halley set to work He figured out the orbits of some of the comets that had been observed by other scientists He made a surprising discovery The comets that had appeared in the year
13、s 1531 1607 and 1682 all had the same orbit Yet their appearances had been 75 to 76 years apart This seemed very strange to Halley Three different comets followed the same orbit The more Halley thought about it the more he thought that there had not been three different comets as people thought He d
14、ecided that they had simply seen the same comet three times The comet had gone away and had come back again It was an astonishing idea Halley felt certain enough to make a prediction of what would happen in the future He decided that this comet would appear in the year 1758 There were 53 years to go
15、 before Halley s prediction could be tested In 1758 the comet appeared in the sky Halley did not see it for he had died some years before Ever since then that comet has been called Halley s comet in his honour 5 Halley made his discovery A by figuring out the orbit of one comet B through his own car
16、eful observation C by using the work of other scientists D by finding Isaac Newton s paper 4 解析 细节理解题 根据第三段第二句可看出 哈雷的发现是在研究其 他科学家的观察成果的基础上得出的 故选 C 项 答案 C 6 Halley made a surprising but correct prediction in the year A 1704 B 1705 C 1706 D 1707 解析 数字计算题 根据倒数第二段第三句可确定哈雷认为这颗彗星下 次出现的时间是 1758 年 然后根据下一句确定这颗彗星是在 1758 年前的 53 年出 现的 再用 1758 减去 53 年就可以得出正确答案为 1705 年 故选 B 项 答案 B 7 Which of the following is TRUE A Edmund Halley is an American scientist B Halley made his prediction by doing experiments C Isaa
