如图为人的屈伸肘运动示意图请据图回答1当� 处于收缩状态� 处于舒张状态时完成了人体的 动作.2如果你两手自然下垂你会感到 Template




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tomski如图为人的屈伸肘运动示意图请据图回答1当� 处于收缩状态� 处于舒张状态时完成了人体的 coloring