在中性点直接接地的系统中，当发生单相接地时，其非故障相的相对地电压（）
A、不变
B、升高不明显
C、长高1.732倍
参考答案：A
读对话，回答问题。
Zip: What's your favourite fruit, Monkey?
Monkey: I like apples. They're sweet.
Rabbit: I like fruit. But I don't like grapes. They're sour. Bananas are my favourite. They're tasty.
Zip: I like carrot juice. It's fresh and healthy. What about you, Zoom?
Zoom: I like beef, but I'm heavy now. I have to eat vegetables.
1. Monkey likes apples. They're ________________.
2. What does Rabbit like? ________________
3. Zip likes ________________. It's fresh and healthy.
双层管廊架主要构件包括()。
A．横梁
B．水平拉筋
C．管廊柱子
D．剪刀撑
