Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
垦利_站群推广系统-官网：hafvxdc.cn_ytyc9pb6
垦利_站群推广系统-官网：hafvxdc.cn_ytyc9pb6
Natural Language
Math Input
