阅读材料，完成下列要求。

材料：革命与改良都是近代中国社会各阶层探索国家生存发展出路，实现民族复兴的主要手段。有人据此图示革命、改良、民族复兴三者问的关系（如图）。

──改编自张福运《对中国近代史上革命与改良的再认识──民族复兴的视角》

运用中国近代史有关史实，对革命、改良与民族复兴间的关系进行探讨。

（说明：可以针对革命、改良、民族复兴三者间的关系进行论证，也可以进行修改、补充、否定或提出新观点，并加以论述，要求观点明确、史论结合、史实准确。）

函数$y=1-2{\sin }^2(x-\frac{\pi }{4})$是(   )

   People know the dangers of fires. It's good for a family to learn how to prepare for a fire. Here are sonic suggestions:
Put a smoke a1arm in the house. Smoke from a fire causes the alarm to go off The alarm makes a loud sound. The sound tells everyone to leave the house at once.
   Make escape (逃脱) plans. They should know all the ways out of the house. If there is a fire, everyone follows the plan to get out. Part of the plan is to check all the windows to make sure they can be opened easily.
   Buy fire extinguishers (灭火器) in the house, Everyone in the family should know how to use them.
   Practise for a fire. They do fire practice because they teach children about fire safety. Everyone in. the family should know the following fire rules:
★ Don't open a hot door! The tire can grow more quickly if you open the door.
★Stay close to the floor! Smoke can be more dangerous than fire, The best air is near the floor because smoke rises.
★What will you do if your hair or clothes start to burn? First, stop! Don't run! The fire burns faster because of more air. Drop! Fall to the floor. Then roll! Turning over and over will make the fire go out. Put a blanket (毯子) around you to keep air away from the fire that may still be on you.
   There are many possible causes for fires. A wise family is ready all the time. If there is a fire, don't forget to call 119 for help