Which pollutant is currently the subject of urgent research（）
A: nitrogen dioxide
B: ozone
C: lead
D: particulate matter
A: nitrogen dioxide
B: ozone
C: lead
D: particulate matter
举一反三
- The main air pollutants include : particulate matter, Ground-level ozone, Nitrogen dioxide, sulfur dioxide, carbon monoxide and lead.
- No matter which is abnormality can lead ______ serious or fatal disease. A: to B: with C: in D: on
- Sulphur dioxide (二氧化硫 ) from the use of coal and oil causes much acid rain, nitrous oxide (氧化氮) which erode our ozone layer.
- ( ) is taken in by plants to make food. A: nitrogen B: hydrogen C: oxygen D: carbon dioxide
- The gas with maximum percentage in the atmosphere is ( ). A: nitrogen B: hydrogen C: oxygen D: carbon dioxide