JQ Soft

最好的化学元素周期表，你口袋中的化学。特征: 1) 118种元素2)每种元素的原子, 热力学, 材料, 电磁, 原子核性质及化学性质 3) 每种元素的电子层结构图4) Solubility chart

It's a simple way to learn Russian alphabet with your kids. There are the colorful big photos wi

Tie Deluxe is the best app on Google Play that shows how to tie a tie.● 13 tie knots (Simple, Double