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The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes
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Which rate indicates the number of children that would be born per women if she were to live to the end of her child-bearing years
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What do you think earth's surface would be like if the earth did not have an atmosphere? explain yo...
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