5.如图是人体屈肘时肌肉的协作示意图.请根据图回答�图中a是肱二头肌b是肱三头肌.当人屈肘时a处于收缩状态b处于舒张状态.�当人伸肘时 Template




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tomski5.如图是人体屈肘时肌肉的协作示意图.请根据图回答�图中a是肱二头肌b是肱三头肌.当人屈肘时a处于收缩状态b处于舒张状态.�当人伸肘时 coloring