将一个大正方形和四个全等的小正方形按图①、②两种方式摆放，则图②中阴影部分的面积（用a、b的代数式表示）是

题干

将一个大正方形和四个全等的小正方形按图①、②两种方式摆放，则图②中阴影部分的面积（用a、b的代数式表示）是（）

A：a²﹣b²

B：ab

C： $\frac{a - b}{4}$

D：（a﹣b）²

上一题下一题 0.0难度选择题更新时间:2019-05-27 12:12:52

B

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Situations	Britons (英国人)	Americans
When being knocked into	They will say “sorry” before the other does.	They will ____ the person and expect him to say “sorry”.
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