A:5x2-4y25=1
B:x25-y24=1
C:y25-x24=1
D:5x2-5y24=1
甲乙两车同时从相距120千米的A、B两地相对开出, 23 小时相遇,甲车每小时行100千米,乙车每小时行多少千米?
He ____ been afraid of dogs ____ ____ since his dad kept a pet dog.