题目内容
If there's ________ water, the bottle will be full.
A. more a little
B. a little more
C. more a few
D. a few more
学练快车道口算心算速算天天练系列答案Have you ever wondered?
1. Why do airplanes take longer to fly west than east?
It can take five hours to go west-east from New York (NY) to London but seven hours to travel east-west from London to NY. The reason for the difference is an atmospheric phenomenon known as the jet (喷射) stream. The jet stream is a very high altitude wind which always blows from the west to the east across the Atlantic. The planes moving at a constant air speed thus go faster in the west-east direction when they are moving with the wind than in the opposite direction.
2. What would happen if the gravity on Earth was suddenly turned off?
Supposing we could magically turn off gravity. Would buildings and other structures (建筑物) float away? What happened would depend on how strongly the things were attached to the Earth. The Earth is moving at quite a speed, moving at over a thousand miles per hour. If you turn something around your head on a string (细绳), it goes around in a circle until you let go of the string. Then it flies off in a straight line. ‘Switching off’ gravity would be like letting go of the string. Things not attached to the Earth would fly off in a straight line. People in buildings would suddenly shoot upwards at a great speed until they hit the ceiling. Most things outside would fly off into space.
【小题1】What information can we get from the first passage?
| A．It is the jet stream that affects how fast airplanes fly. |
| B．Planes go slower when they are moving with the wind. |
| C．It takes more time to fly from NY to London than from London to NY. |
| D．The jet stream always blows from the east to the west across the Atlantic. |
| A．send for | B．move quickly |
| C．come out | D．grow quickly |
| A．buildings and other structures would float away |
| B．trees and buildings would not so easily fly off |
| C．something around your head would not float away |
| D．everything outside buildings would fly off into space |
| A．It takes seven hours to travel from London to New York. |
| B．The earth is moving at a high speed |
| C．Everything on the earth will float away if there’s no gravity. |
| D．Everything not attached to the earth would fly off in a straight line. |
| A．In a research paper. |
| B．In a short story. |
| C．In a travel magazine. |
| D．In a student’s book. |
阅读短文，然后在下面的表格中完成内容提要，每空不超过3个单词。（共4个小题，每小题2分）
New Energy in the Twenty-first Century
Energy from the wind
Wind is a kind of clean energy, and there is lots of it, But, if there's no wind, there is no wind energy.
Energy from the water
When water moves from a high place to a lower place, it can make electricity(电）without pollution. However, people have to build dams(水坝) to use this energy, and building dams is very expensive.
Energy from the earth
There is heat in the rocks under the earth. Scientists use the heat to make geothermal(地热的)energy. This kind of energy is cheap, but it is only possible in a few places in the world.
Energy from the sun
Solar panels (太阳电池板) on the roofs of houses can turn energy from the sun into electricity. Solar power is clean and plentiful(丰富的).but when the weather is bad, It doesn't work.
New Energy in Twenty-first Century
|
|
Advantages |
Disadvantages |
|
Wind Energy |
Clean .There is a lot. |
It needs 1. |
|
Water Energy |
2. |
It is expensive. |
|
Geothermal Energy |
3. |
only possible in a few places |
|
Solar Energy |
Clean and plentiful. |
It depends too much on4. |