真空断路器的特点（）
A、所需的操作能量小
B、体积小、重量轻
C、能防火、防爆操作噪声小
D、灭弧性能强，比空气高100倍
参考答案：A, B, C
根据人教版九年级英语Unit11 Could you please tell me where the restrooms are? SectionB 3a-4，回答下列问题。
1. Is Watertown a great place for the family to take a vacation?
2. Who will enjoy the Clown Cafe?
3. Which museum do the teenagers love?
-_______is it from your home to the centre of the town?
-Only 10 minutes on foot.
A．How often
B．How soon
C．How far
D．How many
