成考院校在线答案
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2022-09-12
[单选] <p class="MsoNormal" style="line-height:18.0pt;mso-line-height-rule:exactly; layout-grid-mode:char">23、<span style="font-family:黑体">图示电路换路前已达稳态，在<span lang="EN-US">t=0</span>时断开开关<span lang="EN-US">S</span>，则该电路（<span lang="EN-US"><span style="mso-spacerun:yes"> </span><span style="mso-spacerun:yes"> </span><span style="mso-spacerun:yes"> </span></span>）<span lang="EN-US"> <o:p></o:p></span></span></p> <p class="MsoNormal" style="text-indent:15.75pt;mso-char-indent-count:1.5; line-height:18.0pt;mso-line-height-rule:exactly;layout-grid-mode:char"> <!--[if gte vml 1]><v:group id="组合_x0020_30" o:spid="_x0000_s1054" style='position:absolute;left:0; text-align:left;margin-left:251.5pt;margin-top:2.4pt;width:141.6pt;height:95.4pt; z-index:251657216' coordsize="2832,1908"> <v:rect id="矩形_x0020_31" o:spid="_x0000_s1055" style='position:absolute; left:172;top:378;width:2294;height:1200' filled="f"></v:rect> <v:shape id="文本框_x0020_32" o:spid="_x0000_s1056" type="#_x0000_t202" style='position:absolute;left:1032;top:1668;width:828;height:240' filled="f" stroked="f"> <v:textbox inset="0,0,0,0"> <![if !mso]> <table _tmplitem="4" cellpadding=0 cellspacing=0 width="100%"> <tr _tmplitem="4" > <td _tmplitem="4" ><![endif]> <div _tmplitem="4" > <p _tmplitem="4" class=MsoNormal align=center style='text-align:center;line-height: 12.0pt;mso-line-height-rule:exactly'><span _tmplitem="4" lang=EN-US style='font-size: 9.0pt;mso-bidi-font-size:12.0pt'><o:p> </o:p></span></p> </div> <![if !mso]></td> </tr> </table> <![endif]></v:textbox> </v:shape><v:shape id="文本框_x0020_33" o:spid="_x0000_s1057" type="#_x0000_t202" style='position:absolute;left:944;top:525;width:854;height:480' filled="f" stroked="f"> <v:textbox style='mso-fit-shape-to-text:t' inset="0,0,0,0"> <![if !mso]> <table _tmplitem="4" cellpadding=0 cellspacing=0 width="100%"> <tr _tmplitem="4" > <td _tmplitem="4" ><![endif]> <div _tmplitem="4" > <p _tmplitem="4" class=MsoNormal style='text-indent:10.5pt;mso-char-indent-count:1.0; line-height:12.0pt;mso-line-height-rule:exactly'><span _tmplitem="4" lang=EN-US>S</span></p> <p _tmplitem="4" class=MsoNormal style='text-indent:5.25pt;mso-char-indent-count:.5; line-height:12.0pt;mso-line-height-rule:exactly'><span _tmplitem="4" lang=EN-US>(t=0)</span></p> </div> <![if !mso]></td> </tr> </table> <![endif]></v:textbox> </v:shape><v:shape id="文本框_x0020_34" o:spid="_x0000_s1058" type="#_x0000_t202" style='position:absolute;left:466;width:434;height:312' filled="f" stroked="f"> <v:textbox style='mso-fit-shape-to-text:t' inset="0,0,0,0"> <![if !mso]> <table _tmplitem="4" cellpadding=0 cellspacing=0 width="100%"> <tr _tmplitem="4" > <td _tmplitem="4" ><![endif]> <div _tmplitem="4" > <p _tmplitem="4" class=MsoNormal style='text-indent:5.25pt;mso-char-indent-count:.5'><i _tmplitem="4" style='mso-bidi-font-style:normal'><span _tmplitem="4" lang=EN-US>R</span></i><sub _tmplitem="4" ><span _tmplitem="4" lang=EN-US>1<o:p></o:p></span></sub></p> </div> <![if !mso]></td> </tr> </table> <![endif]></v:textbox> </v:shape><v:group id="组合_x0020_35" o:spid="_x0000_s1059" style='position:absolute; 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line-height:12.0pt;mso-line-height-rule:exactly'><i _tmplitem="4" style='mso-bidi-font-style: normal'><span _tmplitem="4" lang=EN-US>U</span></i><sub _tmplitem="4" ><span _tmplitem="4" lang=EN-US>S</span></sub></p> <p _tmplitem="4" class=MsoNormal style='text-indent:4.5pt;mso-char-indent-count:.5; line-height:12.0pt;mso-line-height-rule:exactly'><span _tmplitem="4" style='font-size: 9.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"'>－</span><span _tmplitem="4" lang=EN-US style='font-size:9.0pt'><o:p></o:p></span></p> </div> <![if !mso]></td> </tr> </table> <![endif]></v:textbox> </v:shape><v:line id="直线_x0020_46" o:spid="_x0000_s1070" style='position:absolute' from="1612,1335" to="1612,1575"> <v:stroke endarrow="oval" endarrowwidth="narrow" endarrowlength="short"></v:stroke> </v:line><v:line id="直线_x0020_47" o:spid="_x0000_s1071" style='position:absolute; flip:y' from="1612,372" to="1612,582"> <v:stroke endarrow="oval" endarrowwidth="narrow" endarrowlength="short"></v:stroke> </v:line><v:line id="直线_x0020_48" o:spid="_x0000_s1072" style='position:absolute; flip:y' from="1622,495" to="1804,810" strokeweight="1pt"></v:line> <v:line id="直线_x0020_49" o:spid="_x0000_s1073" style='position:absolute' from="1612,585" to="1822,585"></v:line> <v:line id="直线_x0020_50" o:spid="_x0000_s1074" style='position:absolute' from="1612,795" to="1612,990"></v:line> <v:oval id="椭圆_x0020_51" o:spid="_x0000_s1075" style='position:absolute; left:1594;top:783;width:60;height:45'></v:oval> <v:shape id="未知" o:spid="_x0000_s1076" style='position:absolute;left:1552; top:630;width:328;height:195' coordsize="314,105" path="m,15c71,7,142,,194,15v52,15,86,52,120,90e" filled="f"> <v:stroke endarrow="block"></v:stroke> <v:path arrowok="t"></v:path> </v:shape><v:shape id="文本框_x0020_53" o:spid="_x0000_s1077" type="#_x0000_t202" style='position:absolute;left:1680;top:990;width:434;height:312' filled="f" stroked="f"> <v:textbox style='mso-fit-shape-to-text:t' inset="0,0,0,0"> <![if !mso]> <table _tmplitem="4" cellpadding=0 cellspacing=0 width="100%"> <tr _tmplitem="4" > <td _tmplitem="4" ><![endif]> <div _tmplitem="4" > <p _tmplitem="4" class=MsoNormal style='text-indent:5.25pt;mso-char-indent-count:.5'><i _tmplitem="4" style='mso-bidi-font-style:normal'><span _tmplitem="4" lang=EN-US>R</span></i><sub _tmplitem="4" ><span _tmplitem="4" lang=EN-US>2<o:p></o:p></span></sub></p> </div> <![if !mso]></td> </tr> </table> <![endif]></v:textbox> </v:shape><w:wrap type="square"></w:wrap> </v:group><![endif]--> <!--[if !vml]--><img width="191" height="12" align="left" v:shapes="组合_x0020_30 矩形_x0020_31 文本框_x0020_32 文本框_x0020_33 文本框_x0020_34 组合_x0020_35 椭圆_x0020_36 椭圆_x0020_37 椭圆_x0020_38 椭圆_x0020_39 文本框_x0020_41 椭圆_x0020_42 矩形_x0020_43 矩形_x0020_44 文本框_x0020_45 直线_x0020_46 直线_x0020_47 直线_x0020_48 直线_x0020_49 直线_x0020_50 椭圆_x0020_51 未知 文本框_x0020_53" src="http://wljy.whut.edu.cn:80/uploadfiles/word/DLYL21.files/image070.png"> <!--[endif]--><span lang="EN-US" style="font-family:黑体"> <o:p></o:p></span></p> <p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US" style="mso-bidi-font-size:10.5pt;font-family:黑体;mso-font-kerning:0pt"> <o:p> </o:p></span></p>
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2022-09-12
[单选] <p class="MsoNormal" style="line-height:18.0pt;mso-line-height-rule:exactly">27、<i style="mso-bidi-font-style:normal"><span lang="EN-US" style="mso-bidi-font-size: 10.5pt;font-family:黑体">R</span></i><span style="mso-bidi-font-size:10.5pt; font-family:黑体">、<i style="mso-bidi-font-style:normal"><span lang="EN-US">L</span></i>、<i style="mso-bidi-font-style:normal"><span lang="EN-US">C</span></i>并联电路中，测得电阻上通过的电流为<span lang="EN-US">3A</span>，电感上通过的电流为<span lang="EN-US">8A</span>，电容元件上通过的电流是<span lang="EN-US">4A</span>，总电流是<u><span lang="EN-US"><span style="mso-spacerun:yes"> </span><span style="mso-spacerun:yes"> </span><span style="mso-spacerun:yes"> </span></span></u><span lang="EN-US">A</span>，电路呈<u> <span lang="EN-US"><span style="mso-spacerun:yes"> </span><span style="mso-spacerun:yes"> </span></span></u>。（<span lang="EN-US"><span style="mso-spacerun:yes"> </span></span>）</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;font-family:黑体;mso-font-kerning: 0pt"> <o:p></o:p></span></p>
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2022-09-12
[单选] <p class="MsoNormal" style="line-height:18.0pt;mso-line-height-rule:exactly; layout-grid-mode:char">25、<span style="font-family:黑体">反映阻抗的性质与次级回路总阻抗性质相反的变压器是（<span lang="EN-US"><span style="mso-spacerun:yes"> </span><span style="mso-spacerun:yes"> </span><span style="mso-spacerun:yes"> </span></span>）<span lang="EN-US"> <o:p></o:p></span></span></p> <p class="MsoNormal" style="mso-pagination:widow-orphan"><span lang="EN-US" style="mso-bidi-font-size:10.5pt;font-family:黑体;mso-font-kerning:0pt"> <o:p> </o:p></span></p>
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2022-09-12
[判断] <p class="MsoNormal" style="mso-pagination:widow-orphan">8、<span style="mso-bidi-font-size:10.5pt;font-family:黑体">正确找出非正弦周期量各次谐波的过程称为谐波分析法。<span lang="EN-US"><span style="mso-spacerun:yes"> </span></span></span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;font-family:黑体;mso-font-kerning: 0pt">( ) <o:p></o:p></span></p>
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2022-09-12
[判断] <p class="MsoNormal">5、<span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">RLC串联电路发生谐振时，电路的无功功率等于零。</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "> <o:p></o:p></span></p>
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2022-09-12
[判断] <p class="MsoNormal">11、<span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">不同频率的电压、电流不构成平均功率，也不能构成瞬时功率。</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "> <o:p></o:p></span></p>
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2022-09-12
[判断] <p class="MsoNormal">3、<span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">非正弦周期电流的有效值，等于它的直流电流的平方与各次谐波电流有效值的平方和的平方根。</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "> <o:p></o:p></span></p>
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2022-09-12
[判断] <p class="MsoNormal" style="mso-pagination:widow-orphan">9、<span lang="EN-US" style="mso-bidi-font-size:10.5pt;font-family:黑体">Y</span><span style="mso-bidi-font-size:10.5pt;font-family:黑体">接三相电源若测出线电压两个为<span lang="EN-US">220V</span>、一个为<span lang="EN-US">380V</span>时，说明有一相接反。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;font-family:黑体;mso-font-kerning: 0pt">( ) <o:p></o:p></span></p>
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2022-09-12
[判断] <p class="MsoNormal" style="mso-pagination:widow-orphan">12、<span style="font-size:12.0pt;font-family:黑体">当两个<span lang="EN-US"> <!--[if gte vml 1]><v:shape id="图片_x0020_321" o:spid="_x0000_i1046" type="#_x0000_t75" alt="&pky723276167&" style='width:20.25pt;height:14.25pt'> <v:fill o:detectmouseclick="t"></v:fill> <v:imagedata src="DLYL26.files/image040.png" o:title="&pky723276167&"></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="27" height="19" alt="&pky723276167&" v:shapes="图片_x0020_321" src="http://wljy.whut.edu.cn:80/uploadfiles/word/DLYL26.files/image041.png"> <!--[endif]--></span>二端口网络按串联方式连接后，其等效<span lang="EN-US"> <!--[if gte vml 1]><v:shape id="图片_x0020_322" o:spid="_x0000_i1047" type="#_x0000_t75" alt="&pky723276167&" style='width:12pt;height:12pt'> <v:fill o:detectmouseclick="t"></v:fill> <v:imagedata src="DLYL26.files/image001.png" o:title="&pky723276167&"></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="16" height="16" alt="&pky723276167&" v:shapes="图片_x0020_322" src="http://wljy.whut.edu.cn:80/uploadfiles/word/DLYL26.files/image042.png"> <!--[endif]--></span>参数矩阵为<span lang="EN-US"> <!--[if gte vml 1]><v:shape id="图片_x0020_323" o:spid="_x0000_i1048" type="#_x0000_t75" alt="&pky723276167&" style='width:61.5pt; height:15.75pt'> <v:fill o:detectmouseclick="t"></v:fill> <v:imagedata src="DLYL26.files/image043.png" o:title="&pky723276167&"></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="82" height="21" alt="&pky723276167&" v:shapes="图片_x0020_323" src="http://wljy.whut.edu.cn:80/uploadfiles/word/DLYL26.files/image044.png"> <!--[endif]--></span>。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;font-family:黑体;mso-font-kerning: 0pt">( ) <o:p></o:p></span></p>
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2022-09-12
[判断] <p class="MsoNormal" style="mso-pagination:widow-orphan">9、<span style="mso-bidi-font-size:10.5pt;font-family:黑体">单一电感元件的正弦交流电路中，消耗的有功功率比较小。 <span style="mso-spacerun:yes"> </span><span style="mso-spacerun:yes"> </span></span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;font-family:黑体;mso-font-kerning:0pt">( ) <o:p></o:p></span></p>
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