下列电器中，（）不能起短路保护作用。A、热继电器B、交流接触器C、熔断器D、组合开关

词汇运用：

1. There is less air ___________ (污染) in the country than in the city.

2. I was ____________ (惊讶) to meet my favourite star in the street.

3. Where is the ___________ (出口) to the new supermarket?

4. This sofa is very ___________ (舒适的) to sit on.

5. I can see many ___________ (顾客) in my cousin's shop on Sunday.

6. Mary is very happy because today is her _________ (twelve) birthday.

7. The children can't wait __________ (open) the presents.

8. The students usually walk out of the classroom _________ (quick) after class.

9. The girl is looking forward to _________ (buy) that new dress.

10. We would like everybody __________ (have) a good time there.

扩展槽包括PCI-E扩展槽、（）以及AGP扩展槽。

一号线地铁列车司机台台面设有哪些？

1307年（）即位于上都。

胶带机的槽型托辊安装距离为（）。

A、1.5m

B、2.5m

C、3m