题目列表(包括答案和解析)
| 小题1: |
|
| 小题2: |
|
| 小题3: |
|
| 小题4: |
|
| 小题5: |
|
| 小题6: |
|
| 小题7: |
|
| 小题8: |
|
| 小题9: |
|
| 小题10: |
|
|
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Reading comprehension
If one looked down at the earth from a position above Europe, he would see land mainly--the continents of Europe and Asia and part of Africa.
But nearly seven-tenths of the earth's surface is covered by water. One ocean, the Pacific, has an area of 63 million square miles.
Many years ago, people thought that the land under all this water was flat. Now they know this is not so. There are as many mountains under the sea as there are on the land.
Scientists believe that in the early days of the earth's history the earth was a ball of burning gas. When this ball began to cool, clouds of water vapour hung in the sky. This vapour turned into rain, and for thousands of years this rain poured down onto the earth. The rain filled the hollows on the earth's surface and formed the oceans.
At first there was very little salt in the sea. The salt was brought to measure the age of the earth by measuring the amount of salt in the sea. Scientists can calculate how many years it took for this amount of salt to be carried from the land into the sea.
Choose the best answer:
(1) The world's oceans and seas occupy roughly ________.
[ ]
A
.thirty-seven million square milesB
.seven percent of the world's surfaceC
.sixty-three million square milesD
.thirty percent of the world's surface(2) Under the sea the land ________.
[ ]
A
.is flat over almost all its surfaceB
.is full of mountainsC
.is almost flat everywhereD
.is made up of as many mountains as above the sea(3) Scientists believe that at first the earth was ________.
[ ]
|
A .flat |
B .clouds of water vapour |
|
C .a ball of burning gas |
D .full of mountains |
(4) Scientists believe that the oceans were formed by ________.
[ ]
A
.Thousands of years of rainB
.the earth's riversC
.The cooling of the burning gas ________.D
.a mixture of water vapour and burning gas(5) Scientists can tell the age of the earth by ________.
[ ]
A
.calculating the amount of salt on the landB
.calculating the quantity of salt in the seaC
.calculating the amount of salt in the sea from the salt on the landD
.measuring the length of the rivers湖北省互联网违法和不良信息举报平台 | 网上有害信息举报专区 | 电信诈骗举报专区 | 涉历史虚无主义有害信息举报专区 | 涉企侵权举报专区
违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com