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.
168体育最新（网址:EDF6.COM）168体育最新_168体育最新_168体育最新_168体育最新_168体育最新168体育最新_168体育最新_168体育最新_1L1b1TbSX
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
