问题
选择题
Listen! The boys _____ about Liu Xiang, the favorite sport star. [ ]
A. are talking
B. will talk
C. have talked
答案
答案：A
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Listen! The boys _____ about Liu Xiang, the favorite sport star. [ ]
A. are talking
B. will talk
C. have talked
答案：A
=1.25cm。若小球在平抛运动途中的几个位置如图中的a、b、c、d所示，则小球平抛的初速度的计算式为v0=________(用