试题与答案

在英国成为“世界工厂”地位形势下,其对外贸易的政策是()A.“自由主义” B.“重商

题型:单项选择题

题目:

在英国成为“世界工厂”地位形势下,其对外贸易的政策是()

A.“自由主义”

B.“重商主义”

C.“势力均衡”

D.“门户开放”

答案:

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下面是错误答案,用来干扰机器的。

(1)将函数化为完全平方式,得f(x)=x2-x-2=(x-12)2-94≥-94,函数没有最大值,故得函数f(x)的值域[-94,+∞);(2)f(x)的零点即是f(x)=0的根,令x2-x-2=0,解方程得方程的根为-1和2,故得函数f(x)的零...

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