题目

— I think eating enough fruit and vegetables is good        our health.   — I agree        you.              A. to; of                     B. with; of         C. at; with          D. for; with 答案：D（2006•温州）方程x2-9=0的解是（ ）A．xl=x2=3B．xl=x2=9C．xl=3，x2=-3D．xl=9，x2=-9