The purpose of the passage is to ……… A. introduce some knowledge about carbon monoxide poisoning B. list the damages that carbon monoxide brings to people. C. give advice on how to avoid
The purpose of the passage is to ………
A. introduce some knowledge about carbon monoxide poisoning
B. list the damages that carbon monoxide brings to people.
C. give advice on how to avoid carbon monoxide poisoning.
D. warn people not to burn fuels to keep warm in the winter.