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Author Question: Male students earn ________ of the D and F grades in school. A) 20 B) 35 C) 58 D) ... (Read 38 times) |
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To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.
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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
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Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.
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Your heart beats over 36 million times a year.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.