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.
第9娱乐（永久链接:SE8.TV）第9娱乐_第9娱乐_第9娱乐_17IHI1
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
