Tincognito
Great help for memorizing the elements.
她前途无量！可以说她的兴趣非常浓厚！
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评论 8
- Tiara
So what exactly happens when they are exposed to H2O? We need answers.
- healthygirl
My kids memorized periodic table over the last summer break. I amnot sure if they can remember all of them until now. I need to check them. Thank you for reminding me;)
- Jim Wattier
Boy, I had a good laugh.
- Nicole Comstock
I love it. You know they make periodic table shower curtains.
- Nadine Smith
Oh my goodness! That's amazing!!
- Michel Limber
Great way to learn.
