一定体积的酸性KMnO4溶液恰好能氧化一定质量的KHC2O4·H2C2O4·2H2O。若用0.2000 mol·L-1的NaOH溶液中和相同质量的KHC2O4·H2C2O4·2H2O,所需NaOH溶液的体积恰好为KMnO4溶液的3倍,则KMnO4溶液的浓度(mol·L-1)为( ) A. 0.0176 B. 0.1600 C.0.1200 D.0.2400 答案:B— Is Tom good _______ sports?— Yes, he is. He is talented ______ music, too.A. at; in B. at; aboutC. in; with D. in; about