题目是:
The area of a rectangluar region The area of a rectangular region
with sides of lengths a and 5 with sides of lengths (a+1) and 4
比大小的题目,答案是D,无法比较.
但是我不太懂为什么无法比较,是不是我漏掉什么条件了
麻烦告诉我,谢谢.