【简答题】(共6分,每空2分)一定温度下,向如图所示的带有可移动活塞的密闭容器中充入2 L SO 2 和1 L O 2 的混合气体,发生如下反应2 SO 2 (g) + O 2 (g) 2 SO 3 (g) 。 (1)若活塞可自由移动,平衡后,活塞停止在“2.1”处,则该反应中SO 2 的转化率为____ ____。 (2)若开始时,充入容器的起始物质分别是 ①2 L SO 2 和1 L O 2 ; ②2 ...
【单选题】听力原文: A twenty-one-year-old American named Philo Farnsworth built the first working television receiver in nineteen twenty-seven. Many scientists around the world had made important discoveries that l...
【简答题】听力原文:Young males generally use alcohol or drugs for excitement. Or they think it will make them more popular. Young females, however, use cigarettes, drugs or alcohol to feel happier, reduce tension o...