题目单项式6a3b6a^{3}b6a3b与9a2b39a^{2}b^{3}9a2b3的公因式是( )A.a2ba^{2}ba2bB.3a3b33a^{3}b^{3}3a3b3C.3a2b3a^{2}b3a2bD.18a3b318a^{3}b^{3}18a3b3知识点:因式分解章节:数学竞赛 / 数与式