The inhalation of mercury vapor can produce harmful effects on the nervous, digestive and immune systems, lungs and kidneys, and may be fatal. Mild, sub-clinical signs of central nervous system toxicity can be seen in workers exposed to an elemental mercury level in the air of 20 μg/m3 or more for several years.
Answer:
B.
Explanation:
Because it talks about peer pressure. Harold said his friend is being chickened.
B a nonresponse occured
since the data was not complete
Answer:
The answer is 680,000
Explanation:
because 4 is not greater than 5 so you replace it and the numbers behind it with 0s