题目内容
The year is 2094. It has been announced that a comet (彗星) is heading towards the Earth. Most of it will miss our plant, 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(大气层) 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 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 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, and 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 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 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 meet the same end?
1.What is mainly described in the passage?
A. An event of imagination.
B. A scientific adventure.
C. A research on space.
D. A historic discovery.
2.When the first piece hits the South Atlantic , it causes _____
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 light and heat from the sun can not reach the earth.
B. Because the land is covered with water
C. Because people there can not live at the temperature of zero.
D. Because wars break out among countries.
4.By giving the example of dinosaurs, the author tries to prove______
A. the Earth could be hit by other objects in space
B. what happened 65 million years ago was an invented story
C. the human beings will die out in 2094
D. animals could not live in the cold climate
5.We may guess that the writer is ______________.
A. worried B. practical
C. a scientist D. full of imagination
1.A
2.D
3.A
4.A
5.D
【解析】
试题分析：文章大意：作者讲述了 2094 年彗星碎片撞击地球后可能产生的灾难，其目的是警告人们在地球的未来可能会发生灾难。
1.文章描述了人类在2094年可能会遭遇的灾难。这些事情只是一种想象而已。故选A。
2.细节理解题。根据文章第二段Huge waves are created and spread outwards form the hole.可以得出答案，选D。
3.文章第三段中提到，南半球的数以万计的人已经死了，而北半球也逃脱不了 这种厄运。因为太阳多年照不到地球，地球上的温度几乎降到了零度。植物遭到了破坏，食物缺乏，导致战争。所以，一切的根源在于A选项。选A。
4.推理判断题。答案在文章最后一段，作者举恐龙这一例子是为了说明地球很有可能再次遭 遇袭击。选A。
5.这是一篇科普文章，通读全文，可看出作者是对若干年后人类可能会面临的灾难进行假想。故作者充满了想象。选D。
考点：考查科普类短文阅读
