什么是自动喷淋系统?
参考答案:
当火灾发生,烧到一定的温度时(约68℃-70℃),该系统内红色的胆会膨胀致使玻璃破裂喷水,该系统具有报警和灭火的双重作用。
完成下列同义句变化。
1. The film started fifteen minutes ago. The film has _______ for fifteen minutes.
2. To protect the environment is our duty. ____ is our duty ________ the environment.
3. I don't want to go to work. I'd rather stay at home. I'd rather stay at home ______ going to work.
4. With the help of the teacher, I found my lost watch. _______ the teacher, I found my lost watch.
5. Susan has been in this city for more than ten years. _____ more than ten years _______
Susan ________ to this city.
国民教育的根本任务是( )
A.追求升学率
B.培养精英人才
C.普及科技知识
D.全面提高国民素质