题型:阅读选择 题类:常考题 难易度:困难
牛津深圳版英语八年级下册Unit 7 The unknown world单元测试.
We want to explore and try to better understand the world in which we live. Space exploration is one of the ways.Through the exploration of space, we can begin to unravel the mysteries of our universe, and to better know our living environment.
Space exploration provides us with knowledge about the beginning of our solar system, our own planet and ourselves. It also helps answer the questions that have puzzled us for many years. Solar system exploration is important because it is good for us.
Space technology has become an important part of our daily lives. Some technology uses satellites to communicate. Satellites are also used to examine the changes in the Earth's climate and seas, for weather report and for military. We also use satellites in food production. Because of the use of space technology in crops, fewer and fewer people will suffer hunger.
The space program provides a chance for nations to work together. The cooperation(合作) promotes peace and understanding between governments and their people. Many governments have taken part in the space technology, including the United States, Russia, Japan, the European nations and India. In the near future, other nations will take part in it. In fact, the United States remains the leader in new space technology.
We often read the Air Quality Index (空气质量指标) or AQI reported in the newspaper. The AQI helps us understand what the air quality around us means to our health. The AQI uses colors, numbers and words to tell us about the air. Let's see what these colors and numbers mean.
AQI colors |
AQI Numbers |
Health word(s) |
What to do |
Green |
0-50 |
Good |
Just enjoy the clean air! |
Yellow |
51-100 |
Moderate(适中) |
Air quality is fine for most people. |
Orange |
101-150 |
Unhealthy for sensitive(敏感的) groups |
Active children and adults and people with lung(肺) disease should spend less time outdoors |
Red |
151-200 |
Unhealthy |
People with lung disease and active kids and adults shouldn't spend too long time outdoors. Everybody else should try to spend less time outside. |
Purple |
201-300 |
Very unhealthy |
People with lung disease and active kids and adults should not spend any time outdoors. Everybody should try not to go outside. |
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