A:48
B:﹣48
C:0
D:xyz
甲每秒跑3米,乙每秒跑4米,丙每秒跑2米,三人沿600米的环形跑道从同一点同时同方向跑步,那么至少经过多长时间三人又同时从出发点出发?
____, this animal ____other parts of the world, and continues to ____ even today.