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A B C D E F G H

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<span style="font-size:10.5pt"><span style="line-height:150%"><span style="font-family:Calibri"><span style="font-size:12.0pt"><span style="line-height:150%"><span style="font-family:宋体">解：</span></span></span><span style="font-size:12.0pt"><span style="line-height:150%">A</span></span><span style="font-size:12.0pt"><span style="line-height:150%"><span style="font-family:宋体">、该函数属于一次函数，故本选错误；</span></span></span></span></span></span><br />
<span style="font-size:10.5pt"><span style="line-height:150%"><span style="font-family:Calibri"><span style="font-size:12.0pt"><span style="line-height:150%">B</span></span><span style="font-size:12.0pt"><span style="line-height:150%"><span style="font-family:宋体">、该函数是</span></span></span><span style="font-size:12.0pt"><span style="line-height:150%">y</span></span><span style="font-size:12.0pt"><span style="line-height:150%"><span style="font-family:宋体">与</span></span></span><span style="font-size:12.0pt"><span style="line-height:150%">x<sup>2</sup></span></span><span style="font-size:12.0pt"><span style="line-height:150%"><span style="font-family:宋体">成反比例，故本选错误；</span></span></span></span></span></span><br />
<span style="font-size:10.5pt"><span style="line-height:150%"><span style="font-family:Calibri"><span style="font-size:12.0pt"><span style="line-height:150%">C</span></span><span style="font-size:12.0pt"><span style="line-height:150%"><span style="font-family:宋体">、该函数属于一次函数，故本选错误；</span></span></span></span></span></span><br />
<span style="font-size:10.5pt"><span style="line-height:150%"><span style="font-family:Calibri"><span style="font-size:12.0pt"><span style="line-height:150%">D</span></span><span style="font-size:12.0pt"><span style="line-height:150%"><span style="font-family:宋体">、该函数符合反比例函数的定义，故本选项正确；</span></span></span></span></span></span><br />
<span style="font-size:10.5pt"><span style="line-height:150%"><span style="font-family:Calibri"><span style="font-size:12.0pt"><span style="line-height:150%"><span style="font-family:宋体">故选：</span></span></span><span style="font-size:12.0pt"><span style="line-height:150%">D</span></span><span style="font-size:12.0pt"><span style="line-height:150%"><span style="font-family:宋体">．</span></span></span></span></span></span><br />

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