题目

物体做匀速圆周运动，则在任意相等的时间内，下列判断错误的是（ ） A．物体的位移都相同B．物体通过的路程都相等C．物体速度方向改变的角度都相等D．物体与圆心连线转过的角度都相等 答案：考点：匀速圆周运动． 专题：匀速圆周运动专题． 分析：理解匀速圆周运动的特点即可正确解答本题，注意位移为矢量，位移相等包括大小和方向相等，角速度、路程都是标量． 解答：解：A、匀速圆周运动是指先速度大小不变的圆周运动，因此在相等时间内通过路程相等，转过的圆心角也相等，但Andy is 13 years old. He is a student at Beijing Sunshine Secondary School. He is very good _________ Maths. After school, he likes _________ basketball __________ his friends. He is __________ the school basketball team. Andy ________ very _________. His _________ basketball player is David Smith. He always watches his games and listens __________ radio programmes about him. Today, he wants _______ write an article about David ________ the basketball Club newsletter. He found a radio programme about him. He is listening carefully and taking notes.小题1:A． inB． atC． onD． of小题2:A． playsB． playC． playingD． to playing小题3:A． withB． andC． ofD． without小题4:A． inB． atC． onD． of小题5:A． playsB． playC． playingD． to playing小题6:A． wellB． goodC． niceD． hard小题7:A． bestB．wellC． goodD． favorite小题8:A． to B． inC． offD． on小题9:A． in B． toC． onD． of小题10:A． forB． atC． onD． of