材料一：2017年5月8日，中共中央***、******主持召开哲学社会科学工作座谈会。他强调：社会大变革的时代，一定是哲学社会科学大发展的时代。当代中国正经历着我国历史上最为广泛而深刻的社会变革，也正在进行着人类历史上最为宏大而独特的实践创新。这种前无古人的伟大实战，必将给理论创造、学术繁荣提供强大动力和广阔空间。这是一个需要理论而且一定能够产生理论的时代，这是一个需要思想而且一定能够产生思想的时代。

材料二：***强调读书是提升理论素养的重要途径。调查显示我国人均图书消费量20年来几乎没变，只有发达国家的几分之一甚至十几分之一；中国人均每天读书不足15分钟，人均阅读量只有日本的几十分之一。图书消费的萎缩势必影响国民阅读习惯的培养，影响全民族的文化素质。只有爱读书的民族才有光明的未来。

尿素和氯化铵是重要化肥

（1）尿素属于____ 肥．其与熟石灰研磨____ （填“能”与“不能”）产生氨气．

（2）实验室可以用加热氯化铵和熟石灰固体混合物的方法制取氨气，同时生成氯化钙和水，其化学方程式为____．

阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。

Once there was a free bird. She floated in the sky,____(catch) worms for lunch and swam in the summer rain trickles(滴), like many ____birds. But she had a habit:____some event occurred in her life, whether good or bad, the bird would pick up a stone ____the ground to memorize it. Every day she sorted out her stones, laughed remembering joyful events, and cried remembering the sad ones.

The bird always took the stones with her, whether she was flying in the sky or walking on ____earth, and she never forgot about them. Years had passed ____the free bird got a lot of stones, but she still kept on sorting them out, remembering the past. It was becoming more and more difficult for her to fly.

The bird was unable to move on her own，____could she catch worms anymore. Only rare rain gave her the necessary energy.But the bird ____(brave) endured all the hardships, ____(guard) her precious memories. After some time the bird died of ____ (starve) and thirst.