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.
金银花娱乐网(网址:EDF6.COM)金银花娱乐网_金银花娱乐网_金银花娱乐网_iD02ViuV2
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random