从理论上讲，同一资产的重置成本、现行市价及收益现值具有（）关系。
A.独立
B.并列
C.替代
D.等同
参考答案：C
点（-2，1）点关于x轴对称的点坐标为______；关于y轴对称的点坐标为______．
—Hi, Xiao Hui, you look tired. What happened?
—I ________ well last night.[ ]
A. didn't sleep
B. don't sleep
C. haven't slept
D. won't sleep
