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想一想1到30之间的任何数字,我们都可以猜出来!
It's pretty simple:
1. Think of a number from 1 to 30.
2. Remember this number.
3. You will be shown 5 slides.
4. On each slide, click YES if your number is there, or click NO if it is not.
5. At the end of the five slides, your number will be magically guessed!