Question

阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。 　　The year is 20.94．It has been announced that a comet（慧星）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 kilometres wide enters the Earth's atmosphere（大气层）with amassive 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 kilometre high,rushes towards southern Africa at 800 kilometres 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 north 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 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 history of the earth．The dinosaurs were on the earth for over 160 million years．Then 65 million years ago they suddeniy 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 meet the same end? (1) What is mainly described in the passage? [　　] A． A historic discovery． B． An event of imagination． C． A research on space． D． A scientific adventure． (2) When the first piece hits the South Atlantic,it canses ________ [　　] A． an earthquake B． damages to cities C． an Earth explosion D． huge waves (3) Why can't the northern half of the earth escape for long? [　　] A． Because the land is covered with water． B． Because the light and heat from the sun can not reach the earth． C． Because people there can not live at the temperature of zero． D． Because wars break out among countries． (4) By Riving the example of dinosaurs,the author tries to prove ________ [　　] A． animals could not live in the cold climate B． what happened 65 million years ago was an invented story C． the human beings will die out in 20.94 D． the Earth could be hit by other objects in space

Answer 1

答案：1．B;2．D;3．B;4．D;
解析：

(1)	解析：本题考查考生的归纳理解能力。由文章一开始的时间The year is 20.94，考生就完全可以猜测这是一篇科幻文章，后面的内容进一步证实这一点。
(2)	解析：细节理解题。由第二段中“Huge waves are created…”获得正确答案。
(3)	解析：细节理解题。第三段中“…but the north won't escape for long”，后面紧接着说明了原因。
(4)	解析：考查推理判断。最后一段中，作者以恐龙为例说明太空中某些物体撞击地球事件是可能发生的。