题目

若f(x)=3x2－x＋1，g(x)＝2x2＋x－1，则f (x)        g (x)。 答案： 》 ．__________, we would not have achieved so much. A．If they didn’t help us B．If it hadn’t been their help C．Weren’t it for their help D．Had it not been for their help