根据短文内容回答问题。

    More and more children play computer games for a long time. Most parents feel quite worried about that. But in fact, not all games are bad for kids.

    There is a popular game called Mole Manor（摩尔庄园）on line now. In this game, it is a world of the kids. Children can do what they want to do there. They can buy what they want and even the pets. Almost every player has one or two pets called Lam. The players can buy something for Lam and they also want to give them some food to eat. Sometimes kids must wash their pets to keep them clean. At that time, they are the parents themselves. That helps them know how much their parents do for them. There are many other games for kids in Mole Manor. Kids can be a policeman here. They can also be a teacher to help the Lams to learn more.

    Get the kids to play for only half an hour on line. Don't hate all computer games and you can be a good parent.

设a=sin145°，b=cos52°，c=tan47°，则a，b，c的大小关系是（　　）

已知函数$f\left(x\right)$满足$f\left(x+1\right)=-f\left(x\right)$，且$f\left(x\right)$是偶函数，当$x\in 0,1$时，$f\left(x\right)=x$，若在区间$-1,3$内，函数$g\left(x\right)=f\left(x\right)-kx-k$有三个零点，则实数k的取值范围是（  ）