设长方体的顶点数为v，棱数为e，面数为f，则v+e+f等于 [ ]
A．26
B．2
C．14
D．10
答案：A
There more than one member who against the plan．
A．is; is
B．is; are
C．are; is
D．are; are
平均指数和综合指数计算结论相同和条件是什么？
