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Author Question: Why are the precise numbers about the national prevalence of multiple disabilities difficult to determine? (Read 4842 times)


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A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

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The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.

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