水利水电工程地质勘察分哪几个阶段进行？
参考答案：
分为规划阶段、可行性研究阶段、初步设计阶段和技施设计阶段等四个阶段。
根据句意，用括号内所给单词的适当形式填空。
1. I got the pen on my ________ (twelve) birthday.
2. Parents should teach their children to make decisions by ________ (they).
3. There are many little ________ (collect) in our class.
4. He was so tired that he fell fast _________ (sleep).
5. We must be careful when we _________ (across) the road.
以下哪种商品适合凭产地名称来表示商品质量和买卖( )
A．土特产
B．电脑
C．纺织品
D．大型机械
