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The distance around Earth's equator is most easily measured in _____. A. parsecs B. kilometers C. light-years D. astronomical units
The images are sent to the Cornea.
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when one muscle is contracted, the other muscle from the pair is always elongated. for example, the biceps and tricep muscles work together to allow you to bend and straighten your elbow. when you want to bend your elbow, your bicep muscle contracts. and at the same time tricep muscles relaxes.
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Explanation:I need to get some answers too