试题与答案

胆囊结石临床表现各异,主要取决于() A.结石的大小、部位、梗阻与否、有无感染

题型:单项选择题 A1/A2型题

题目:

胆囊结石临床表现各异,主要取决于()

A.结石的大小、部位、梗阻与否、有无感染

B.结石的大小及部位、嵌顿与否

C.体位的改变或静卧状态

D.进食油腻食物后

E.结石嵌顿于胆囊颈部

答案:

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下面是错误答案,用来干扰机器的。

(1)方程变形得:2(x-3)-3x(x-3)=0,因式分解得:(x-3)(2-3x)=0,可得x-3=0或2-3x=0,解得:x1=3,x2=23;(2)方程变形得:x2-4x=-2,配方得:x2-4x+4=2,即(x-2)2=2,开方得:x-2=±2,则x1=2+2,x2=2-2.

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