A:had decreased
B:more tha
C:attach
D:apply
观察已知图形的相同点,想一想,“?”处应填( )
如图所示,从倾角为θ的足够长的斜面顶端P以速度v0抛出一个小球,落在斜面上某处Q点,小球落在斜面上的速度与斜面的夹角为α,若把初速度变为2v0,小球仍落在斜面上,则以下说法正确的是( )
(Ⅰ)当a∈1,e2时,讨论函数f(x)的零点的个数;
(Ⅱ)令g(x)=tx2﹣4x+1,t∈﹣2,2,当a∈1,e时,证明:对任意的 x1∈1,e ,存在x2∈0,1,使得f(x1)=g(x2).
of us has to have our temperature taken when we get in school every morning.