题目

下列说法不正确的是                                  (     )                A.抛向空中的球,在空中运动时,受到手向上的抛力和重力    B.静止在水平地面上的足球受到重力和地面对它的支持力,这两个力是平衡力    C.木块在桌面上滑行,滑行过程中受到桌面对它施加的阻力作用而慢慢停下来    D.火车头牵引着车厢前进,火车头施加给车厢的力是动力,而车厢施加给火车头的力是阻力—What about asking these new graduates to take on the task?—I m afraid not.While they are energetic and ambitious, _____ of them seems to be suitable for this demanding job.A.no oneB.everyoneC.noneD.few
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