[名词解释] 变换

血栓闭塞性脉管炎病理改变为（） ["A、炎症","B、血栓形成","C、血栓痉挛","D、血管周围炎","E、肢体远端缺血坏死"] 语言的接触 自由变体 语言中稳固性最强的是（） ["A、语音","B、词汇","C、语法","D、语义"] 结肠所属的淋巴结为（） ["A、结肠上淋巴结","B、结肠下淋巴结","C、结肠旁淋巴结","D、结肠中间淋巴结","E、中央淋巴结"] 变换