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【简答题】
标杆管理的概念是什么?请列举几种常见的标杆管理方法。
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举一反三
【单选题】关于动摩擦因数μ的说法，下列陈述正确的是（）。
A.
由公式µ=j／N可知，动摩擦因数与两物体间正压力Ⅳ的大小成反比
B.
动摩擦因数µ只跟相互接触面的材料有关，与其他因素无关
C.
动摩擦因数µ的大小与两物体相互接触的面积有关
D.
当物体在水平面上滑行的速度不断增大时，动摩擦因数µ也会跟着增大
【简答题】质量为50kg 的人站在电梯里的磅秤上,当电梯以4.9 的加速度上升时,磅秤读数是 kg.
【单选题】In his inaugural speech,______said that 'the only thing we have to fear is fear itself'.
A.
Lyndon Johnson
B.
Theodore Roosevelt
C.
John F. Kennedy
D.
Franklin Roosevelt
【单选题】'The only thing we have to fear is fear itself' meant that ______.
A.
Americans would lose if they gave way to fear
B.
Americans have no real troubles during the 1930s
C.
F. D. R. would solve America's problems because he was not afraid
D.
Americans were in trouble because they hadn't looked at their troubles with clear heads
【单选题】In his inaugural speech,______said that 'the only tiling we have to fear is fear itself.'
A.
Abraham Lincoln
B.
Theodore Roosevelt
C.
Woodrow Wilson
D.
Franklin Roosevelt
【简答题】质量为50kg的人站在电梯里的磅秤上，当电梯以4.9m/s^2的加速度上升时，磅秤读数是 kg.
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