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關(guān)于多項式3x<sup>2</sup>-y-3xy<sup>3</sup>+x<sup>5</sup>-1，下列說法錯誤的是（　?。? </h1> <div id="wt0sjhg" class="exam-s"> <span id="iaw9o4o" class="op-item"><span id="fn1ndcq" class="op-item-nut">A . </span><span id="vyd3adc" class="op-item-meat">這個多項式是五次五項式</span></span> <span id="zwnd44u" class="op-item"><span id="3zqcxvy" class="op-item-nut">B . </span><span id="ygc4tsb" class="op-item-meat">常數(shù)項是-1</span></span> <span id="49ci8zy" class="op-item"><span id="f4n4nmv" class="op-item-nut">C . </span><span id="8lce5hk" class="op-item-meat">四次項的系數(shù)是3</span></span> <span id="9zcxexv" class="op-item"><span id="dgtk9c0" class="op-item-nut">D . </span><span id="3le4bes" class="op-item-meat">按x降冪排列為x<sup>5</sup>+3x<sup>2</sup>-3xy<sup>3</sup>-y-1</span></span> </div> </div> </div> </li> </ul> <div style="height:20px;background-color: #fff;margin-top:1px"></div>  <div class="pbne4b4" id="J_ConnectQuestionsdBox"> </div> </div> </div> <div id="er3eaic" class="g-sd2">  <div 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