A、B、C、D为初中化学常是的物质,它们之间存在如下图所示的转化关系.已知
B是密度最小的气体单质,D的水溶液呈蓝色.根据信息和图示回答问题(反应条件和部分生成物已略去).
I'm Lucy. I have a happy family. There are four people in my family. My birthday is on January 1st. It's New Year's Day, too. My family and I will have a big dinner on that day. I have a little brother. He is four years old. His birthday is in winter. It's very cold but we can make a snowman. My mother's birthday is in March. My father's birthday is in March,too. We can plant trees and fly kites.
鹧鸪天
辛弃疾
读渊明诗不能去手,戏作小词以送之。
晚岁躬耕不怨贫,只鸡斗酒聚比邻。都无晋宋之间①事,自是羲皇以上人②。
千载后,百遍存。更无一字不清真。若教王谢诸郎③在,未抵柴桑④陌上尘。
【注释】①晋宋之间:东晋末至刘宋初,陶渊明生活的时代。②羲皇以上人:指上古以远的人。③王、谢:东晋的两大望族,其子弟以潇洒儒雅见称。④柴桑:古县名,今江西九江市西南。陶渊明的故乡。