题目

    we admit that there are still some problems about NMET, we don’t mean that it is of no use． A．Until         B．While          C．As            D．Unless 答案：B8．已知菱形的边长等于2，菱形的一条对角线长也是2，则另一条对角线的长是（　　）A．4B．2$\sqrt{3}$C．$\frac{13}{60}$D．3