函数$f\left(x\right)=x^2-x-2,x\in -5,5$，那么在区间-5,5中任取一个值x₀，使$f\left(x_0\right)\le 0$的概率为(    )

结合语境，在下面语段中的横线处填写词语，正确的一是 （     ） 
米芾是宋代著名书画家。他经常反复            历代的书法名画，研究学习名家的笔墨技法。他吸收各派大家之长，以水墨挥洒点染表现烟雨掩映的江南山水，              ，创造了被后世称之为“米点山水”的绘画技法，开创了文人画山水的新局面。

在挂风景画时，可自制一个重锤来检查像框是否挂正，如图甲所示，这是利用 ____的知识．如图乙所示，在装修楼房时，工人师傅常常用一根足够长的装满水的透明塑料软管，两人各执一端靠在墙面的不同位置，在与水面相平的位置做上记号，确定同一高度的两点．这样做是利用 ____的原理．

   It' s Sunday morning. There are many people in the park, some boys are playing basketball. There are some girls under a big tree. They' re singing and dancing. What are those women doing? They are drinking tea. Look at the woman in a blue coat.  Who' s she?  She' s my mother. She is talking to Edward. Edward is her student. He is a good student. He studies hard . He' s good at all the subjects. And he' s friendly to all his teachers and his friends.