题型:问答题 简答题 如图所示,质量为2kg的物体与水平地面的动摩擦因数为μ=0.2.现对物体作用一向右与水平方向成37°、大小为10N的拉力F,使之向右做匀加速运动.求物体运动的加速度的大小 (sin37°=0.6,cos37°=0.8). 查看答案
题型:问答题 简答题 Iceland has the oldest parliament, which goes as far back to 930 A.D. when Althing, the legislative organization, was established.A.officeB.adobeC.assemblyD.building 查看答案