But I am pretty sure about one thing it will probably be the most ____(值得做的).
Everyone _________ us to win the match, but we lost.
如图所示,在固定的斜面上,用平行于斜面的力F推物体,而物体保持静止状态.关于斜面对物体的摩擦力,可能的是( )
如图所示,四边形ABCD中,∠B=90°,AB=2,CD=8,AC⊥CD,若sin∠ACB=13,则cos∠ADC=____.
以下选项不属于细胞膜成分的是