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dunno if this helps :>
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A half step, or semitone, is the smallest interval between notes in Western music. Notes that are directly next to each other—such as E and F, or A sharp and B—are a half step apart. Two half steps equal one whole step. The notes G and A are one whole step apart, as are the notes B flat and C
Answer:As early as 7000 BCE, during the Neolithic Age, people of Jericho refashioned
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I think its because we're not exactly immune to all the diseases, it's called the immune system because the cells defend the body from bad bacteria and it teaches your body to learn to fight against the bacteria from a virus/disease until the body is immune.
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What is that? It looks cool though!