识别断路器油位指示器（如图E-68所示）各元件的名称。
参考答案：
1-M6mm固定螺栓；2-压环；3-油位玻璃；4-密封垫；5-上出线座。
按括号内要求，完成下列句子，每空格限填一词。
小题1:Grace learns English by reading aloud. (改为否定句)
Grace ___________ ___________English by reading aloud.
小题2:Tina was waiting for me when I arrived at the museum. (对划线部分提问)
___________ was Tina ___________ when you arrived at the museum?
小题3:We may put the flowers in the classroom. (改为被动语态)
The flowers may ___________ ___________in the classroom.
小题4:He isn’t old enough to see this thriller. (改为同义句)
He is ___________ young ___________ see this thriller.
小题5:他们将建立粮食储备所来帮助贫穷的人们。(汉译英)
They will ___________ ___________ a food bank to help the poor people.
简述平台消防系统的基本组成。
