某物体做匀速直线运动,由速度的计算公式v=s/t可知[ ]
A.速度与路程成正比
B.速度的大小不变,运动的路程与时间成正比
C.速度与时间成反比
D.以上说法都不正确
答案:B
They're ________ bike riding and _________ hiking for vacation. [ ]
A. go; go
B. going; go
C. going; going
D. go; going