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.
细菌菌落每 3 小时翻倍。增长 100 倍需要多长时间？
细菌菌落每 3 小时翻倍。增长 100 倍需要多长时间？
Natural Language
Math Input
Extended Keyboard
