题目膀胱尿反流至明显扩张的输尿管,属于()A. Ⅰ级B. Ⅱ级C. Ⅲ级D. Ⅳ级E. Ⅴ级膀胱尿反流至明显扩张的输尿管,属于()A. Ⅰ级B. Ⅱ级C. Ⅲ级D. Ⅳ级E. Ⅴ级题目解答答案D. Ⅳ级