Zhou Libo is ___________ to make all the audience __________.
A:enough funny, laugh
B:funny enough, laugh
C:enough funny, to laugh
D: funny enough, to laugh
若函数y=(k﹣1)x+b+2是正比例函数,则( )
如图所示,光滑水平桌面上的布带上静止放着一质量为m=1.0kg的小铁块,它离布带右端的距离为L=0.5m,铁块与布带间动摩擦因数为μ=0.1.现用力从静止开始向左以a0=2m/s2的加速度将布带从铁块下抽出,假设铁块大小不计,铁块不滚动,g取10m/s2,求: