CD盘存储数据采用在盘上压制凹坑的方法，________用来表示“1”。
参考答案：凹坑边缘
根据句首字母提示填空
1. I'm t_________; I would like something to drink.
2. We hear with our e _________and see with our e _________.
3. The t_________festival in China is the Spring Festival.
4. What’s the m _________with you?
5. Don't get s_________ out.It will make you sick.
车站列控中心安全输出单元的功能是控制进站信号机降级显示继电器
