分包商资质条件（）国家建筑业企业资质管理的相关规定
参考答案：必须符合
物体重1000N，如果用一个定滑轮提起它，要用______N的力。如果用一个动滑轮提起它，至少要用_______N的力。（不计摩擦及滑轮自重）
Which of the following is NOT included in the Carnegie Institute of Pittsburgh().
A.A library
B.A school of technology.
C.A museum of fine arts.
D.A museum of national history.
