44.
What do we know about Winston Churchill?
A. He
is an early bird. B.
He got up at 4 am.
C. He
rose late.
D. He hosted meetings in his office.
B
China’s
government has been trying all measures to reduce pollution in the past few
years. Now people can enjoy a fresh environment everywhere. The following two
graphs are adopted from the column of “City Information” on the webpage of
Beijing Review.
Graph 1: Olympic Cities Air Quality Report
City |
Date |
API |
Major Pollutant |
Air Quality Degree |
Quality Condition |
Beijing |
Sep.8 |
37 |
N / A |
I |
Very good |
Qinhuangdao |
Sep. 8 |
52 |
PM10 |
II |
Good |
Qingdao |
Sep.8 |
68 |
PM10 |
II |
Good |
Shanghai |
Sep.8 |
67 |
PM10 |
II |
Good |
Shenyang |
Sep.8 |
88 |
PM10 |
II |
Good |
Tianjin |
Sep.8 |
54 |
PM10 |
II |
Good |
Graph 2: Chinese National Standard
API Values |
Levels of health concern |
Colors |
When the API is in this
range : |
… air quality conditions
are : |
… as symbolized by this
color: |
0 to 50 |
Very good |
Blue |
50 to 100 |
Good |
Green |
101 to 150 |
Slight pollution |
Yellow |
151 to 200 |
Moderate pollution |
Orange |
201 to 250 |
Medium pollution |
Red |
251 to 300 |
High pollution |
Purple |
301 to 500 |
Hazardous |
Brown |
Notes:
﹡﹡API stands for
Air Pollution Index(指数).
﹡﹡Particulate
matter(PM10)is a major component of air
pollution that threatens both our health and our environment. It consists of very
small liquid and solid particles floating in the air.
﹡﹡Sulfur dioxide(SO2)acts as an acid.
Inhalation(吸入)results in labored breathing, coughing, or a sore throat and
may cause permanent lung damage.