题目

阅读短文，根据短文内容和已给出的首字母，在空白处填入适当的单词。将完整的单词写在短文后面的横线上。 Only Mother Love is true love. It gives everybody everything all h___1___ life. When you are still a baby, mother takes good care of you as much as p___2___. In your w__3___  hours, she always holds you in her arms. When you are ill, she stops her work right now to look after you day and night a___4___ forgets about herself. When you are growing up enough to go to school, mother still l___5___ after you all the time. On cold winter days, she alway函数f（x）的定义域为开区间（a，b），导函数f′（x）在（a，b）内的图象如图所示，则函数f（x）在开区间（a，b）内有极小值点的个数为（ ）A．1B．2C．3D．4