《继电保护和安全自动装置技术规程》规定，在电压互感器二次回路中，除开口三角线圈外，应装设（）或熔断器。
参考答案：自动开关
给下列答话选择合适的问句。
1. I'm twenty years old. [ ]
A. How are you?
B. How old are you?
2. It's one thirty. [ ]
A. What's the time?
B. What's time is it?
3. I'm 1.3 metres tall.[ ]
A. How tall you are?
B. How tall are you?
4. I live in a house on the First Avenue.[ ]
A. Where do you live?
B. When do you live?
5. My address is 746 the Second Avenue.[ ]
A. What's your address?
B. What your address?
“自项目开始至项目完成”指的是项目的( )。
A．计划期 B．实施期 C．周期 D．工期
