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问题 单项选择题

下列选项中，（）按照项目占用土地而使社会成员由此损失的该土地“最佳可行替代用途”的净效益计算。

A.沉没成本

B.土地影子价格

C.土地机会成本

D.新增资源的消耗

答案

参考答案：C

句型转换

句型转换。

1. screens, it, most, biggest, has, the, seats, the, comfortable, and,  (.)  (连词成句)

_______________________________________________________________

2. I think Bargain House has the worst quality.  (改为否定句)

    I_______think Bargain House_______the worst quality.

3. A hotel room is about 320 yuan a night. (就画线部分提问)

  _______the_______of a hotel room a night?

4.This jacket is cheaper than that one.(改为同义句)

    That jacket is_______ _______than this one.

5. What does he think about the music group?(改为同义句)

   _______ _______ he _______the music group?
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填空题

观察下列乘法运算结果：

（x+1）（x-1）=x2-1

（x2+x+1）（x-1）=x3-1

（x3+x2+x+1）（x-1）=x4-1

（x4+x3+x2+x+1）（x-1）=x5-1

…

根据上面乘法运算结果的规律计算：（xn-1+xn-2+xn-3+…+x3+x2+x+1）（x-1）=______．
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