用唯物辩证法联系观的知识，分析“幸福9号”养老模式的构建。

 根据下表中的信息填空：

（1）其中酸性最强的是____；

（2）鸡蛋清是____性；

（3）若向一支盛有氨水的试管中滴稀盐酸，则试管中液体的pH会____（填“变大”“变小”或不变）.

     Mr. Jackson is a teacher of science in a middle school. His students like his classes because his classes are very interesting. They can learn a lot in his class. The students can make（制作）many things. His little son Val also likes making things. He makes lots of machines（机器）, such as a machine like a man. It can do the job that is dangerous（危险的）for people to do. He says, “I want to be a scientist.”
根据短文内容，选择正确答案。