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Author Question: A string of twelve holiday lamps is designed to be connected in series to a 120-V source. If one of ... (Read 3383 times) |
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
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.
The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.