A great number of students said they were forced to practise the piano.
A:to question
B:to be questioned
C:questioned
D:questioning
甲、乙两车都做匀速直线运动,两车的速度分别为15m/s和10m/s,则两车都运动10s时间后的路程之比为( )
一字组多词。
骨____ ____ 哀____ ____ 勤____ ____