人员密集场所巡逻是指保安员在人员密集场所区域内，通过巡回观察安全检查、疏导人员等方式维护场所秩序的一种服务形式
参考答案：对
句型转换。
1. She has been studying in this school for 3 years.(对画线部分提问)
2. He's very frightened. He can't move. (合并为一句)
3. Lily sometimes goes camping.(对画线部分提问)
4. What are you doing for vacation? (用go camping回答)
I'm______ ______for vacation.
5. I just finished my model plane.(改为一般疑问句)
______ you______ ______ your model plane?
燃气储备站的生产工艺流程按燃气的储存（）分类，一般可分为高压储备站工艺流程和低压储备站工艺流程两大类。
A、方式
B、类型
C、压力
D、温度
