题目

We all know that sports may help us become stronger. But their     41   go far beyond this. Research shows that sports that     42     aiming and hitting skills, for example, tennis, badminton and baseball, help children increase     43     . They help develop leadership qualities and     44     team spirit in kids. They involve(包括) competition. Playing sports teaches them to accept     45     with a positive spirit when they lose a game. Playing sports does a lot of good to the development of    46    skills. Sports teach you to commu8．一物体做匀减速直线运动．已知加速度的大小为3m/s2．在它运动到速度为零的过程中，下列说法正确的是（　　）A．物体在任意1s内的末速度一定等于初速度的$\frac{1}{3}$B．物体在任意1s内的末速度一定比初速度小3m/sC．物体在任意1s内的末速度一定比前1s内的初速度大3m/sD．物体在任意1s内的初速度一定比前1s内的末速度大3m/s