设函数$f\left(x\right)=\left\{\begin{array}{c}{x}^2+bx+c\left(x\le 0\right)\\ 2\left(x>0\right)\end{array}\right.$，若$f\left(-4\right)=f\left(0\right),f\left(-2\right)=-2$，则关于x的方程 $f\left(x\right)=x$的解的个数为（  ）

   A pretty, well-dressed young lady stopped a taxi in a big square, and said to the driver, “Can you see that young man at the other side of the square?”
   “Yes,” said the taxi-driver. The young man was standing outside a restaurant and looking impatiently at his watch every few seconds.
   “Take me over there.” said the young lady.
   There were a lot of cars and buses and trucks in the square, so the taxi- driver asked, “Are you afraid to cross the street.”
   ‘Oh, no !” said the young lady. “But I said that I would meet that young man for dinner at one o’c1ock, and it is now a quarter to two. If I arrive in a taxi, it will at least seem as if I have tried not to be too late.”

在一个不透明的口袋中，有若干个红球和白球，它们除颜色外都相同，从中任意摸出一个球，摸到红球的概率0.75，若白球有3个，则红球有____个.

  ①声波  ②听神经  ③耳蜗内的听觉感受器  ④鼓膜  ⑤听小骨  ⑥大脑

列是某中学为“重走古丝绸之路”夏令营活动所搜集的材料。据此同答问题。

材料一下图示意考察区域的地理环境．

材料二  M、N城均为历史丈化名城。《资治通鉴》称M城及其附近在唐代“阎阎相望，桑麻翳野”。2010年5月经国务院批准，N城设立经济特区(范围包括N城及其西部口岸)。