题目

Jen and Jeff Fisher were a lovely couple with two kids who would soon be faced with a life-changing decision. Not only would it change the ________ of the family that they already had but it would also change the ________ of three young children that came into their home.The Fishers already had two ________ of their own: 13-year old Aiden and 10-year-old Macy. The Fishers decided to ________ another child and were introduced to the foster (寄养的) system. It was through foster care that they’d ________ three kids who would change everything.A social worker who worked with the foster syste已知y=f（x）为R上的可导函数，当x≠0时，，则关于x的函数的零点个数为（ ）A．1B．2C．0D．0或 2