题目: 在刚结束的全运会110米栏的比赛中,刘翔以13秒34封王,创史上首个三连冠.在30米时用了4秒,100米时的速度12米每秒刘翔在跑完全程的过程中的平均速度是______m/s. 答案: v=st=110m13.34s=8.25m/s故答案为:8.25m/s.
题型:选择题 19.—Flight 331 _____.I'd better be on my way.Goodbye. —Bye.Happy landing!A.is announcedB.is being announcedC.is announcingD.has announced 查看答案