题干
阅读下列短文，按要求完成各题。
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. |
里填上适当的数，使组成的数符合指定的要求．