要烙5张饼，一口平底锅一次只能烙2张，两面都要烙，每面需要3分钟，最少需要（　　）分钟能烙好5张饼．

学习知识要真正做到融会贯通，疏而不漏，学习了原子的构成知识后，你做到这一点了吗？下列叙述错误的是（  ）

    Next to（靠近） the No.l Middle School is a school store. It's not 1but it has 2 of school things (学习用品). D0 3 like books, erasers, pens 4color pencils? They're 5 sale. Big erasers are only one yuan6 and the small one is 0.5 yuan. Those color pencils are only7two yuan. I want the yellow pencil sharpener(卷笔刀). It is8a good price. I'll take it. Do you need some school things for 9?10to this store!