在各类建筑玻璃中，由两块凹形玻璃经熔接或胶接而成，强度高、绝热性能好，常用作透光墙体

综合填空。（10分）根据短文内容，用所给单词的适当形式填空。

live,  develop,  spend,  by，poor

 
In the past, China was very 小题1:. It has developed more quickly in recent years. With the  小题2: of China, what changes will take place   小题3: 2050? Now we have some modern factories. They can produce products with high quality(质量). And some people are looking for better ways小题4:  free time. They want  小题5: a happy life. So catching up with the changes of the world is a great challenge for the young
people.