liangjialing823
liangjialing823 liangjialing823
  • 07-12-2020
  • Health
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What must skeletal muscles do to move? A. engage their fibers slowly B. twitch involuntarily C. separate from the bone D. contract and relax

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jh345039125 jh345039125
  • 07-12-2020

Answer:D. contract and relax

Explanation:

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valentinacharlie8
valentinacharlie8 valentinacharlie8
  • 07-12-2020
D.contract and relax
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