题目

______ to hide the truth from the public, the quality problem of its computer was revealed.        A. As HP company tried hard       B. As hard HP company tried        C. Hard as HP company tried D. Hard did HP company try 答案：C一物体由静止开始沿一光滑斜面顶端开始下滑，滑至斜面底端时速度的大小为v，则物体在斜面中点时的速度为（ ）A．B．C．D．