Answer: carbon monoxide,hydrogen cyanide
Explanation:
B, it influences one’s attitude and behavior.
Answer:
C. Skeletal muscle is not directly controlled by the autonomic nervous system.
Explanation:
Environmental Tobacco Smoke (ETS).
Well,i think the answer would be : no symptoms
Symptom is a physical or mental feature that is used as an indicator for the existence of a disease (such as rash, fever, etc)
Those above are simply laboratory facts/data, not symptoms
