题目

雨滴由静止开始下落,遇到水平吹来的风,下述说法正确的是: ①风速越大,雨滴下落时间越长 ②风速越大,雨滴着地时速度越大 ③雨滴下落时间与风速无关 ④雨滴着地速度与风速无关    A.①②   B.②③ C.③④ D.①④ 答案:BWhich of these paintings was painted by the famous artist Leonardo da Vinci? _______.A.NoneB.No oneC.NothingD.Neither
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