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Author Question: There are three types of sprinkler heads: spray heads, rotary heads, and impact drive heads. ... (Read 456 times) |
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The horizontal fraction bar was introduced by the Arabs.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
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Famous people who died from poisoning or drug overdose include, Adolf Hitler, Socrates, Juan Ponce de Leon, Marilyn Monroe, Judy Garland, and John Belushi.
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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.