如图为屈肘时的状态��分别为两组肌肉下列说法正确的是 A.�收缩�舒张b.�收缩�收缩c.�舒张�收缩d.�舒张�舒张——青夏 Template


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tomski如图为屈肘时的状态��分别为两组肌肉下列说法正确的是 a.�收缩�舒张b.�收缩�收缩c.�舒张�收缩d.�舒张�舒张——青夏 coloring