问题描述：
一道SAT数学,读不懂题
The pattern shown above is composed of rectangles.This pattern is used repeatedly to completely cover a rectangular region 12L units long and 10L units wide.How many rectangles of dimension L by W are needed
图就不上了,尤其不明白什么是How many rectangles of dimension L by W are needed
这个L by W怎么讲呢
求指教
The pattern shown above is composed of rectangles.This pattern is used repeatedly to completely cover a rectangular region 12L units long and 10L units wide.How many rectangles of dimension L by W are needed
图就不上了,尤其不明白什么是How many rectangles of dimension L by W are needed
这个L by W怎么讲呢
求指教
问题解答：
我来补答展开全文阅读