每个车轮上只设一块闸瓦的，称为单闸瓦式基础制动装置。
参考答案：对
汽车以2m/s2的加速度由静止开始运动，5s内汽车的位移为____，第5s内汽车的位移为___。
One of the men present held the view ________ the book said was right.
A．what that
B．what
C．that
D．that what
