试题与答案

复合性溃疡常在何时出现A.胃溃疡先于十二指肠溃疡B.十二指肠溃疡先于胃溃疡C.十二指

题型:单项选择题

题目:

复合性溃疡常在何时出现

A.胃溃疡先于十二指肠溃疡
B.十二指肠溃疡先于胃溃疡
C.十二指肠溃疡与胃溃疡同时
D.十二指肠溃疡愈合后
E.十二指肠溃疡合并胃炎后才出现胃溃疡

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B解析: 由相似三角形的性质可知:BC:BG=CH:FG,因此CH=BC×FG÷BG=6×10÷(6+10)=3.75厘米,DH=CD-CH=6-3.75=2.25厘米,阴影面积为三角形BDH和三角形GDH面积之和,因此阴影部分面积为平方厘米。

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