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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

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Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

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Vital signs (blood pressure, temperature, pulse rate, respiration rate) should be taken before any drug administration. Patients should be informed not to use tobacco or caffeine at least 30 minutes before their appointment.

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You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

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Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Ammonium as an energy source for chemoautotrophic bacteria in soil. Ammonium as an energy source for chemoautotrophic bacteria in soil.
A Model of a Pulsating X-Ray Source A Model of a Pulsating X-Ray Source
Basic sliding effleurage using the palms of the hands provides full contact with the leg. Basic sliding effleurage using the palms of the hands provides full contact with the leg.
Basic two-handed kneading. Tissues are lifted with the whole hand in firm contact. Basic two-handed kneading. Tissues are lifted with the whole hand in firm contact.
Type II curve. Mortality does not vary with age. Data for five-lined skink (Eumeces fasciatus). Type II curve. Mortality does not vary with age. Data for five-lined skink (Eumeces fasciatus).
Satellite data showing net primary production. Productivity is coded as red (highest) down through o Satellite data showing net primary production. Productivity is coded as red (highest) down through o
Video: Role of the respiratory system - effect of altered ventilation rates

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