直线y=x与函数$f\left(x\right)=\left\{\begin{array}{c}2,x>m\\ x^2+4x+2,x<m\end{array}\right.$的图象恰有三个公共点，则实数m的取值范围是____

      Dinner customs are different around the world. If you are a guest in Ghana(加纳),  this information will help you a lot.
      In Ghana, dinner is usually from four in the afternoon to six in the evening. But there are no strict rules about time. Whenever a guest arrives, a family offers food. When you go to a home, the person who receives guests takes you to the living room first. At this time everyone welcomes you. Then you go to the dinning room. There you wash your hands in a bowl of water. All the food is on the table. In Ghana you usually eat with your fingers. You eat from the same dish as everyone else .But you eat from one side of the dish only. It is not polite to get food from the other side of the dish. After dinner, you wash your hands again in a bowl of water.
      Most meals in Ghana have a dish called fufu. People in Ghana make fufu from the powder (粉末)of some plants. Sometimes they cut the fufu with a saw(锯子)because it is very hard. You must chew(咀嚼 )fufu well, or you may get sick. You eat fufu with the fingers of your right hand only.

如图所示，在倾角为α的光滑斜面上，垂直纸面放置一根长为L、质量为m的直导体棒，导体棒中通有大小为I、方向垂直纸面向里的电流，欲使导体棒静止在斜面上，可以施加方向垂直于导体棒的匀强磁场．求：

在一朵桃花的结构中，子房将来能发育成的结构是（　　）