如果平行四边形的四个内角的平分线能够围成一个四边形，那么这个四边形一定是[ ]
A． 平行四边形
B． 矩形
C． 菱形
D． 正方形
答案：B
下列哪项不属于施工图预算的编制方法（）。
A.定额单价法
B.工程量清单单价法
C.实物量法
D.扩大单价法
Which function is NOT served by building a prototype
A．It takes the place of the final syste
B．It assists in gathering software requirements
C．It assists in estimating the cost of the projec
D．It is used as the foundation of the larger project
