神经根型颈椎病患者，臂丛牵拉试验致食指、中指发麻，肱三头肌反射减弱。判断病变的椎间孔位于

A、C[img=~\/QImg\/Tiles\/YZ81_3.gif]～C[img=~\/QImg\/Tiles\/YZ81_4.gif]
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