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【单选题】
对输尿管狭窄的叙述中,错误的是A.
共有3个狭窄部
B.
肾孟与输尿管移形处为一狭窄部
C.
与髂血管交叉处为一狭窄部
D.
末端开口于膀胱内面的输尿管口为一狭窄部
E.
输尿管结石常滞留于输尿管的狭窄部
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