为了（ ），在贮存和使用易燃液体的区域必须要有良好的通风。
A、防止易燃气体积聚而发生爆炸和火灾
B、冷却易燃液体
C、保持易燃液体的质量
参考答案：A
在控制线路中，常采用（），主要用于线路中的保护环节。
A.电压继电器
B.电流继电器
C.中间继电器
D.时间继电器
填写单词根据句子意思, 在空格中填写适当的单词, 使句子完整、正确。(共8分, 每小题1分)
小题1:September is the _________ month of the year.
小题2:Alice likes singing and she wants to be a __________ in the future.
小题3:Nobody taught my sister drawing. She learnt it by __________.
小题4:I’m _________ of the dark. That’s why I always go to sleep with the light on.
小题5:My classmates are all friendly. I find it easy to get on __________ with them.
小题6:I want to buy some snacks in the supermarket. Could you please go ________ with me?
小题7:It’s a fact that Diaoyu Islands _________ to China.
小题8:To keep the H7N9 flu away, we should often wash our ________ and do more exercise.
