成考院校在线答案
- 2024-03-05 [单选] <p class="MsoNormal" style="line-height:150%">27、<span style="font-size:12.0pt; line-height:150%;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman";mso-font-kerning:0pt">已知</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%"><span style="position: relative;top:28.0pt;mso-text-raise:-28.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1256" type="#_x0000_t75" style='width:49.8pt;height:63pt' o:ole=""> <v:imagedata src="xxds03.files/image317.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="66" height="84" v:shapes="_x0000_i1256" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image318.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1256" DrawAspect="Content" ObjectID="_1604818982"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;line-height:150%; font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">和</span><span lang="EN-US" style="font-size:12.0pt; line-height:150%"><span style="position:relative;top:28.0pt;mso-text-raise: -28.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1257" type="#_x0000_t75" style='width:60pt;height:63pt' o:ole=""> <v:imagedata src="xxds03.files/image319.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="80" height="84" v:shapes="_x0000_i1257" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image320.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1257" DrawAspect="Content" ObjectID="_1604818983"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;line-height:150%; font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">是线性方程组</span><span lang="EN-US" style="font-size:12.0pt; line-height:150%"><span style="position:relative;top:3.0pt;mso-text-raise: -3.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1258" type="#_x0000_t75" style='width:40.2pt;height:15pt' o:ole=""> <v:imagedata src="xxds03.files/image308.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="54" height="20" v:shapes="_x0000_i1258" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image297.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1258" DrawAspect="Content" ObjectID="_1604818984"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;line-height:150%; font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">的两个解，则系数矩阵</span><span lang="EN-US" style="font-size:12.0pt; line-height:150%"><span style="position:relative;top:2.0pt;mso-text-raise: -2.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1259" type="#_x0000_t75" style='width:13.2pt;height:13.8pt' o:ole=""> <v:imagedata src="xxds03.files/image321.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="18" height="18" v:shapes="_x0000_i1259" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image260.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1259" DrawAspect="Content" ObjectID="_1604818985"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;line-height:150%; font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">是（</span><span style="font-size:12.0pt;line-height:150%"> </span><span style="font-size:12.0pt;line-height:150%;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">）</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%;mso-font-kerning:0pt"> <o:p></o:p></span></p>
- 2024-03-05 [单选] <p class="MsoNormal">15、<span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">袋中有</span><span lang="EN-US" style="font-size:12.0pt">5</span><span style="font-size:12.0pt; font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">个球（</span><span lang="EN-US" style="font-size:12.0pt">3</span><span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">新</span><span lang="EN-US" style="font-size:12.0pt">2</span><span style="font-size:12.0pt;font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">旧），每次取</span><span lang="EN-US" style="font-size:12.0pt">1</span><span style="font-size:12.0pt; font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">个，无放回的抽取</span><span lang="EN-US" style="font-size:12.0pt">2</span><span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">次，则第</span><span lang="EN-US" style="font-size:12.0pt">2</span><span style="font-size:12.0pt;font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">次取到新球的概率为（</span><span style="font-size:12.0pt"> </span><span style="font-size:12.0pt;font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt"><span style="color:white"> <o:p></o:p></span></span></p>
- 2024-03-05 [单选] <p class="MsoNormal">10、<span lang="EN-US"> <!--[if gte vml 1]><v:shape id="图片_x0020_180" o:spid="_x0000_i1202" type="#_x0000_t75" style='width:444.6pt;height:48.6pt; mso-position-horizontal-relative:page;mso-position-vertical-relative:page'> <v:imagedata src="xxds01.files/image179.png" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="593" height="65" v:shapes="图片_x0020_180" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image179.png"> <!--[endif]--></span></p>
- 2024-03-05 [单选] <p class="MsoNormal" style="line-height:20.0pt;mso-line-height-rule:exactly">11、<span lang="EN-US"> <!--[if gte vml 1]><v:shape id="图片_x0020_84" o:spid="_x0000_i1109" type="#_x0000_t75" style='width:378.6pt;height:21.6pt; mso-position-horizontal-relative:page;mso-position-vertical-relative:page'> <v:imagedata src="xxds02.files/image091.png" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="505" height="29" v:shapes="图片_x0020_84" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image091.png"> <!--[endif]--></span><span lang="EN-US" style="mso-bidi-font-size:10.5pt"> <o:p></o:p></span></p>
- 2024-03-05 [单选] <p class="MsoNormal">30、<span style="font-size:12.0pt;font-family:宋体">设随机变量<span lang="EN-US"><span style="position:relative;top:2.0pt;mso-text-raise:-2.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1187" type="#_x0000_t75" style='width:14.4pt;height:12.6pt' o:ole=""> <v:imagedata src="xxdsb07.files/image273.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="19" height="17" v:shapes="_x0000_i1187" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image262.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1187" DrawAspect="Content" ObjectID="_1604819102"> </o:OLEObject> </xml><![endif]--></span>的概率密度为</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative;top:14.0pt;mso-text-raise:-14.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1188" type="#_x0000_t75" style='width:102pt;height:36.6pt' o:ole=""> <v:imagedata src="xxdsb07.files/image274.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="136" height="49" v:shapes="_x0000_i1188" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image275.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1188" DrawAspect="Content" ObjectID="_1604819103"> </o:OLEObject> </xml><![endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">，</span><span style="font-size:12.0pt;font-family:宋体">则<span lang="EN-US"><span style="position:relative;top:2.0pt;mso-text-raise:-2.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1189" type="#_x0000_t75" style='width:24pt;height:12.6pt' o:ole=""> <v:imagedata src="xxdsb07.files/image276.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="32" height="17" v:shapes="_x0000_i1189" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image277.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1189" DrawAspect="Content" ObjectID="_1604819104"> </o:OLEObject> </xml><![endif]--></span>（ ）</span><span lang="EN-US" style="mso-bidi-font-size: 10.5pt"> <o:p></o:p></span></p>
- 2024-03-05 [单选] <p class="MsoNormal" style="line-height:150%">35、<span style="font-size:12.0pt; line-height:150%;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">从一批产品中随机抽两次，每次抽</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%">1</span><span style="font-size:12.0pt;line-height:150%;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">件。以</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%">A</span><span style="font-size:12.0pt;line-height:150%;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">表示事件“两次都抽得正品”，</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%"> <o:p></o:p></span></p> <p class="MsoNormal" style="line-height:150%"><span lang="EN-US" style="font-size:12.0pt;line-height:150%"><span style="mso-tab-count:1"> </span>B</span><span style="font-size:12.0pt;line-height:150%;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">表示事件“至少抽得一件次品”，则下列关系式中，正确的是（</span><span style="font-size:12.0pt;line-height:150%"> </span><span style="font-size: 12.0pt;line-height:150%;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">）</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%"><span style="color:white"> <o:p></o:p></span></span></p>
- 2024-03-05 [单选] <p class="MsoNormal" style="line-height:20.0pt;mso-line-height-rule:exactly">36、<span lang="EN-US"> <!--[if gte vml 1]><v:shape id="图片_x0020_44" o:spid="_x0000_i1069" type="#_x0000_t75" style='width:179.4pt;height:18.6pt; mso-position-horizontal-relative:page;mso-position-vertical-relative:page'> <v:imagedata src="xxds02.files/image051.png" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="239" height="25" v:shapes="图片_x0020_44" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image051.png"> <!--[endif]--></span><span lang="EN-US" style="mso-bidi-font-size:10.5pt"> <o:p></o:p></span></p>
- 2024-03-05 [单选] <p class="MsoNormal" align="left" style="text-align:left;mso-pagination:widow-orphan; vertical-align:middle">32、<span lang="EN-US"> <!--[if gte vml 1]><v:shape id="图片_x0020_8" o:spid="_x0000_i1032" type="#_x0000_t75" style='width:157.8pt;height:85.8pt; mso-position-horizontal-relative:page;mso-position-vertical-relative:page'> <v:imagedata src="xxds01.files/image008.png" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="210" height="114" v:shapes="图片_x0020_8" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image008.png"> <!--[endif]--></span><span lang="EN-US" style="mso-bidi-font-size:10.5pt"> <o:p></o:p></span></p>
- 2024-03-05 [单选] <p class="MsoNormal" style="line-height:150%">21、<span style="font-size:12.0pt; line-height:150%;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman";mso-font-kerning:0pt">下列各式中有（</span><span style="font-size:12.0pt;line-height:150%;mso-font-kerning:0pt"> </span><span style="font-size:12.0pt;line-height:150%;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman";mso-font-kerning: 0pt">）等于</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%"><span style="position:relative;top:6.0pt;mso-text-raise:-6.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1263" type="#_x0000_t75" style='width:90pt;height:21pt' o:ole=""> <v:imagedata src="xxds05.files/image280.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="120" height="28" v:shapes="_x0000_i1263" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image281.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1263" DrawAspect="Content" ObjectID="_1604819073"> </o:OLEObject> </xml><![endif]--></span><span lang="EN-US" style="font-size:12.0pt;line-height: 150%;mso-font-kerning:0pt"> <o:p></o:p></span></p>
- 2024-03-05 [单选] <p class="MsoNormal">25、<span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">设随机变量</span><span lang="EN-US" style="font-size:12.0pt;position:relative;top:3.0pt;mso-text-raise: -3.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1197" type="#_x0000_t75" style='width:9pt;height:10.8pt'> <v:imagedata src="xxdsb10.files/image275.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="12" height="14" v:shapes="_x0000_i1197" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image276.png"> <!--[endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">的</span><span lang="EN-US" style="font-size:12.0pt;position:relative;top:5.0pt;mso-text-raise:-5.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1198" type="#_x0000_t75" style='width:97.2pt;height:16.8pt'> <v:imagedata src="xxdsb10.files/image277.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="130" height="22" v:shapes="_x0000_i1198" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image278.png"> <!--[endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">，用切比雪夫不等式估计</span><span lang="EN-US" style="font-size:12.0pt;position:relative;top:5.0pt;mso-text-raise:-5.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1199" type="#_x0000_t75" style='width:84pt;height:15pt'> <v:imagedata src="xxdsb10.files/image279.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="112" height="20" v:shapes="_x0000_i1199" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image280.png"> <!--[endif]--></span><span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">（</span><span style="font-size:12.0pt"> </span><span style="font-size:12.0pt;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">）</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt"> <o:p></o:p></span></p>