单项填空 Look at the kids________on the playground! A. playing soccer B. to play basketball C. are playing tennis 答案:A
甲、乙两人从相距36千米的两地相向而行.如果甲比乙先走2小时,那么他们在乙出发2.5小时后相遇;如果乙比甲先走2小时,那么他们在甲出发3小时后相遇.甲、乙两人每小时各走多少千米?
设甲、乙两人每小时分别行走x千米,y千米,填写下表并求x,y的值.
∴x=________,y=________.