乒乓球教练组将从右手执拍的选手R、S、T和左手执拍的选手L、M、N、0中选出四名队员去参加奥运会。要

<span style="font-size:13px">乒乓球教练组将从右手执拍的选手<span lang="en-us">R</span>、<span lang="en-us">S</span>、<span lang="en-us">T</span>和左手执拍的选手<span lang="en-us">L</span>、<span lang="en-us">M</span>、<span lang="en-us">N</span>、<span lang="en-us">0</span>中选出四名队员去参加奥运会。要求至少有两名右手执拍的选手,而且选出的四名队员都可以互相配对进行双打。已知<span lang="en-us">S</span>不能与<span lang="en-us">L</span>配对,<span lang="en-us">T</span>不能与<span lang="en-us">N</span>配对,<span lang="en-us">M</span>不能与<span lang="en-us">L</span>或<span lang="en-us">N</span>配对。 若<span lang="en-us">R</span>不被选入队中,那么有几种不同的选法<span lang="en-us">?( )<?xml:namespace prefix="o" ns="urn:schemas-microsoft-com:office:office"></?xml:namespace><o:p></o:p></span></span> <span style="font-size:13px" lang="en-us">A.</span><span style="font-size:13px">只有一种<span lang="en-us">B.</span>两种<span lang="en-us">C.</span>三种<span lang="en-us">D.</span>四种<span lang="en-us"><o:p></o:p></span></span>

时间:2023-01-27 06:42:19

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