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src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmi+mathvariant%3D%22normal%22%3EA%3C%2Fmi%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">和<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmi+mathvariant%3D%22normal%22%3EB%3C%2Fmi%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">貼著筒的內(nèi)壁在水平面內(nèi)做勻速圓周運動，<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmi+mathvariant%3D%22normal%22%3EA%3C%2Fmi%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">的半徑較大，則（　?。?p style="text-align:justify;"><img src="http://tikupic.21cnjy.com/ct20241o/35/47/3547d3d1722ecf4e67737ea44e297d3b.png" width="138" height="158" style="max-width:100%;"></p> </h1> <div id="xmykusj" class="exam-s"> <span id="uqjywzi" class="op-item"><span id="qyaowxx" class="op-item-nut">A . </span><span id="zfm74ib" class="op-item-meat"><img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmi+mathvariant%3D%22normal%22%3EA%3C%2Fmi%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">球的角速度小于<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmi+mathvariant%3D%22normal%22%3EB%3C%2Fmi%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">球</span></span> <span id="lkvallc" class="op-item"><span id="3ztqy3b" class="op-item-nut">B . </span><span id="vakxhgx" class="op-item-meat"><img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmi+mathvariant%3D%22normal%22%3EA%3C%2Fmi%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">球的線速度小于<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmi+mathvariant%3D%22normal%22%3EB%3C%2Fmi%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">球</span></span> <span id="2cddtbu" class="op-item"><span id="sykh2h9" class="op-item-nut">C . </span><span id="frdk08m" class="op-item-meat"><img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmi+mathvariant%3D%22normal%22%3EA%3C%2Fmi%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">球的周期等于<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmi+mathvariant%3D%22normal%22%3EB%3C%2Fmi%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">球</span></span> <span id="dyat2y4" class="op-item"><span id="idyohyl" class="op-item-nut">D . 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