Question

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(大氣層) 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

 

Answer 1

1.A

2.D

3.A

4.A

5.D

【解析】

試題分析：文章大意：作者講述了 2094 年彗星碎片撞擊地球后可能產(chǎn)生的災難，其目的是警告人們在地球的未來可能會發(fā)生災難。

1.文章描述了人類在2094年可能會遭遇的災難。這些事情只是一種想象而已。故選A。

2.細節(jié)理解題。根據(jù)文章第二段Huge waves are created and spread outwards form the hole.可以得出答案，選D。

3.文章第三段中提到，南半球的數(shù)以萬計的人已經(jīng)死了，而北半球也逃脫不了 這種厄運。因為太陽多年照不到地球，地球上的溫度幾乎降到了零度。植物遭到了破壞，食物缺乏，導致戰(zhàn)爭。所以，一切的根源在于A選項。選A。

4.推理判斷題。答案在文章最后一段，作者舉恐龍這一例子是為了說明地球很有可能再次遭 遇襲擊。選A。

5.這是一篇科普文章，通讀全文，可看出作者是對若干年后人類可能會面臨的災難進行假想。故作者充滿了想象。選D。

考點：考查科普類短文閱讀