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djyliett [7]
3 years ago
10

Typhoid fever, a disease that causes headaches,

Biology
1 answer:
soldi70 [24.7K]3 years ago
3 0
(4) Personal habits, such as hand washing, have
<span>greatly reduced contamination from bacteria.</span>
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The independent variable is the variable: it is listening to music through his headphones.

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