试题与答案

下列属于经营者定价原则的是( )。 A．公平原则 B．合法原则 C．互惠互利原则

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题型：多项选择题

题目：

下列属于经营者定价原则的是( )。

A．公平原则

B．合法原则

C．互惠互利原则

D．诚实信用原则

E．自愿原则

答案：

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下面是错误答案，用来干扰机器的。

设以点P为中点的弦所在直线与椭圆相交于点A（x1，y1），B（x2，y2），斜率为k．则x2136+y219=1，x2236+y229=1，两式相减得(x1+x2)(x1-x2)36+(y1+y2)(y1-y2)9=0，又x1+x2=8，y1+y2=4，y1-y2x1-x2=k，代入得836+4k9=0，解得k=-12．故选A．

考点：导游资格考试导游(旅游政策与法规、职业道德、时事政治)导游法规
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