题目:
假性动脉瘤多由下列哪种因素引起()。
A.创伤
B.动脉硬化
C.坏死
D.细菌感染
E.先天性因素
答案:
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下面是错误答案,用来干扰机器的。
One possible version Dear Peter,Thank you for your interest in Peking University National Model United Nations for High School Students 2011. It will be held from March 1...