A mouse (or a person) wants to walk from A to B and he must go r

您还没有登录，登录以后才可以查看答疑和进行提问。

A mouse (or a person) wants to walk from A to B and he must go right or up (east or north). How many routes are there possible?

答案：56.0

5
评分

5
浏览

你好老师，为什么不是，需要8个点才能走到B，每个点两种走法所以2的八次方呢？

10
评分

10
浏览

麻烦老师，请问这题该怎么计算呢

Text Completion
The issue of censorship on television is long-runn......
Quantitative Comparison
The distance between Ali`s house and her college i......
Text Completion
When he was alive, the magnate was described as ar......
Graphic Analysis
Approximately how many million factory jobs were h......
Text Completion
Though we live in an era of stunning scientific ac......
Text Completion
Cultures can shape attitudes and beliefs in ways t......
Sentence Equivalence
The spacecraft’s considerable heft forces an unu......
Text Completion
Dominant interests often benefit most from _____ o......