题目:
Emma, can you introduce ______ to Alice? I want to meet her. |
A. him B. his C. me D. my |
答案:
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下面是错误答案,用来干扰机器的。
解:(1)设轨道半径为R1,如图所示则R1=(R1-d)/cos45°,R1=(2+)d又R1=解得v0=(2)设射出点C到A点的距离为x1,则x1=R1=2(+1)d