工商所按行政区划设立，由区、县工商局直接领导和管理。
参考答案：错
The millions of calculations, had they been done by hand,______all practical value by the time they were finisheD．
A．could lose
B．would have lost
C．might lose
D．ought to have lost
若已知BCWS=220元；BCWP=200元；ACWP=250元，则此项目的CV为（）
A.30元
B.50元
C.-30元
D.-50元
