输气站整体试运有哪些要求？
参考答案：
按设计工况进行各流程试运，站内工艺管线、设备、仪表、站控、SCADA系统调试合格，系统连续平稳运行72h为合格。
用所给单词的适当形式填空
1. It's seven o'clock. Let's start _____(have) dinner.
2. I met an old friend while _____(walk) on the street.
3. It's too _____(noise) here. Let's go somewhere quiet.
4. It's rude _____(stick) your chopsticks into your food.
5. Who is _____(young) student in your class?
起重机的起升机构、变幅机构的制动器，必须是（）制动器：
A、常开式
B、常闭式
