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Author Question: Nothing is seen in the sight glass (R-12 system). Technician A says that the system may be ... (Read 62 times) |
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.
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For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.
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Cyanide works by making the human body unable to use oxygen.
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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.