题型:问答题 简答题 His calculation of the result of the exam _______ to the fact, but he failed again.A.approximatedB.focusedC.consistedD.contracted 查看答案
题型:问答题 简答题 关于机械能守恒,下列说法正确的是[ ]A.做匀速直线运动的物体,其机械能一定守恒 B.做匀速圆周运动的物体,其机械能一定守恒 C.平抛运动的物体,其机械能一定守恒 D.物体不受摩擦力,机械能一定守恒 查看答案