题目

如图所示,在地面上方的A点以Ek1=4J的初动能水平抛出一小球,小球刚要落地时的动能Ek2=13J,落地点在B点。不计空气阻力,则A、B两点的连线与水平面间的夹角约为(    )A. 30°      B. 37°   C. 45°      D. 60° 答案:B— Excuse me, you are _____ of my passing through.     — I'm sorry, here you go.     [     ]A. on the way B. in the way C. out the way D. off the way
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