某物质M在隔绝空气的条件下，稍加热分解生成氨气（NH₃）、二氧化碳和水．根据实验事实得出的结论是（   ）

笔下生辉。

二十年后的我

提示：想象一下，二十年后，你将会是什么样子？从事什么职业？生活得怎么样？将你的想象写下来和大家分享。不少于400字。

图为突触结构模式图，下列说法不正确的是（    ）

阅读理解。
A
    How do you go to school?  
   Sally： My school is not far from my home. It is about three kilometers. I usually walk to school, but sometimes I go to school by bike.
   Nick： My mother usually drives me to school. But when Aunt Lucy is here, I walk with her. It takes me 7 minutes by car or 25 minutes on foot.
   Mary：I go to school on the school bus. The bus comes at 8: 35 am and I get to school at 8: 50 am. I love to take the school bus because my best friend Linda takes it with me. We have lots of fun.

如图所示的光现象中，属于光的折射现象的是（  ）