根据汉意，选出正确的单词填空。

1. 三支蜡烛  three _______________ (candles / balloons)

2. 开车  drive the _______________ (car / plane)

3. 关门  close the _______________ (window / door)

4. 放风筝  fly the _______________ (boat / kite)

5. 扔纸飞机  throw the _______________ (plane / boat)

滑触线线夹两侧的横拉线，应用（）绝缘。

A.瓷瓶

B.木棒

C.角钢