在施工成本控制中,把施工成本的实际值与计划值的差异叫作()。
参考答案:施工成本偏差
下列变化只发生物理变化的是( )
A.纸张燃烧
B.氢氧化钠变质
C.铁丝弯曲
D.稀盐酸清除铁锈
—Sally, could you go and help your father wash the car?
—Why __________? I'm busy now. Amy is lying on the grass doing nothing.[ ]
A. me
B. I
C. him
D. her