Answer:
Oxygen tanks should be stored in a stand or cart to prevent tipping and falling. Store extra, unsecured tanks by placing them flat on the floor. Do not allow tanks to stand or lean in an upright position while unsecured. DO NOT store oxygen systems in unventilated areas such as closets or cabinets.
It is B if you learn the circulatory system or learning to become a doctor the answer is B
Answer:
we are become black . and we may suffer from many disease . and our face and body become dull .
