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.
18体育APP下载（网址:EDF6.COM）18体育APP下载_18体育APP下载_18体育APP下载_18体育APP下载_18体育APP下载18体育APP下载_18体育APP下载_18体育APP下载_41K11PPg4
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
