猜你喜欢
- 1They were so far away that I couldn't make out their faces clearly.
- 2一个篮球队,五名队员A、B、C、D、E,由于某种原因,C不能做中锋,而其余四人可以分配到五个位置的任何一个上.问:共有_种不同的站位方法.
- 3hot Nice girls elane and chen翻译
- 4叶公好龙成语接龙20个.
- 5Maria won first prize in yesterday撇 s singing competition
- 6如图,物体A重120N,在重力为GB的物体B的作用下在水平桌面上做匀速直线运动,A与桌面之间的摩擦力为f.如果在A上加一个水平向左大小为180N的拉力F,物体B匀速上升,则下列选项正确的是(
- 7以乙为参照系,可知甲的相对加速度为a'=a1-a2,v1'=v,s'=s 则在此参照系中,只有当甲相对于乙做减速运
- 8the red bag is cheapest of all the bags 找出错误一项并改正
- 9设抛物线y2=2px(p>0)的焦点为F,其准线与x轴交于点C,过F作它的弦AB,若∠CBF=90°,则|AF|-|BF|的长为( ) A.2p B.p C.p2 D.4p
- 10若1/x-1/y=2,则(3x+xy-3y)/(x-xy-y)的值为?