成考院校在线答案
- 2024-03-05 [单选] <p class="MsoNormal" align="left" style="text-align:left;mso-pagination:widow-orphan; vertical-align:middle">19、<span lang="EN-US" style="mso-bidi-font-size:10.5pt; color:black;mso-font-kerning:0pt">Yesterday was _______ beautiful day ________ we decided to go swimming.</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" align="left" style="text-align:left;mso-pagination:widow-orphan; vertical-align:middle">24、<span lang="EN-US" style="mso-bidi-font-size:10.5pt">For a successful business, friendly and ______ staff are essential. <o:p></o:p></span></p>
- 2024-03-05 [单选] <p class="MsoNormal">1、<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"><span style="position:relative; top:6.0pt;mso-text-raise:-6.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1119" type="#_x0000_t75" style='width:75pt;height:18.6pt' o:ole=""> <v:imagedata src="xxdsb09.files/image156.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="100" height="25" v:shapes="_x0000_i1119" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image157.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1119" DrawAspect="Content" ObjectID="_1604819192"> </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"">独立同分布，且</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative; top:12.0pt;mso-text-raise:-12.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1120" type="#_x0000_t75" style='width:167.4pt;height:30.6pt' o:ole=""> <v:imagedata src="xxdsb09.files/image158.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="223" height="41" v:shapes="_x0000_i1120" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image159.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1120" DrawAspect="Content" ObjectID="_1604819193"> </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"">，则</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_i1121" type="#_x0000_t75" style='width:86.4pt;height:34.2pt' o:ole=""> <v:imagedata src="xxdsb09.files/image160.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="115" height="46" v:shapes="_x0000_i1121" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image161.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1121" DrawAspect="Content" ObjectID="_1604819194"> </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"> </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"> <o:p></o:p></span></p>
- 2024-03-05 [单选] 27、已知4阶行列式中第1行元依次是-4,0,1,3, 第3行元的余子式依次为-2,5,1,x ,则X=<br>
- 2024-03-05 [单选] <p class="MsoNormal" style="line-height:20.0pt;mso-line-height-rule:exactly">7、<span lang="EN-US"> <!--[if gte vml 1]><v:shape id="图片_x0020_189" o:spid="_x0000_i1213" type="#_x0000_t75" style='width:333pt;height:22.2pt; mso-position-horizontal-relative:page;mso-position-vertical-relative:page'> <v:imagedata src="xxds02.files/image195.png" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="444" height="30" v:shapes="图片_x0020_189" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image195.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%">5、<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"">有一群人受某种疾病感染患病占</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%">20%</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"">，现随机地从他们中抽出</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%">50</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"">人，则其</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%"> <o:p></o:p></span></p> <p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt"><span style="mso-tab-count:1"> </span><span style="mso-spacerun:yes"> </span></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"">患病人数的数学期望和方差分别是（</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>
- 2024-03-05 [单选] <p class="MsoNormal" style="line-height:150%">31、<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">设</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_i1189" type="#_x0000_t75" style='width:36pt;height:19.2pt' o:ole=""> <v:imagedata src="xxds04.files/image225.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="48" height="26" v:shapes="_x0000_i1189" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image226.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1189" DrawAspect="Content" ObjectID="_1604818968"> </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 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_i1190" type="#_x0000_t75" style='width:12pt;height:13.2pt' o:ole=""> <v:imagedata src="xxds04.files/image219.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="16" height="18" v:shapes="_x0000_i1190" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image220.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1190" DrawAspect="Content" ObjectID="_1604818969"> </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"">的特征值且</span><span lang="EN-US" style="font-size:12.0pt; line-height:150%"><span style="position:relative;top:5.0pt;mso-text-raise: -5.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1191" type="#_x0000_t75" style='width:40.2pt;height:16.8pt' o:ole=""> <v:imagedata src="xxds04.files/image227.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="54" height="22" v:shapes="_x0000_i1191" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image228.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1191" DrawAspect="Content" ObjectID="_1604818970"> </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"">，则</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_i1192" type="#_x0000_t75" style='width:19.8pt;height:21pt' o:ole=""> <v:imagedata src="xxds04.files/image229.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="26" height="28" v:shapes="_x0000_i1192" src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image230.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1192" DrawAspect="Content" ObjectID="_1604818971"> </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"">）特征值</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">31、 <span style="line-height:150%;font-family:Microsoft Yahei;font-size:12pt;">设随机变量</span><span style="line-height:150%;font-size:12pt;"> <!--[if gte vml 1]><![endif]--> <!--[if !vml]--><img width="104" height="22" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image184.png"> <!--[endif]--></span><span style="line-height:150%;font-family:Microsoft Yahei;font-size:12pt;">是相互独立的随机变量序列，且服从相同</span><span style="line-height:150%;font-size:12pt;"> </span></p><p class="MsoNormal"> <span style="line-height:150%;font-size:12pt;"><span> </span><span> </span></span><span style="line-height:150%;font-family:Microsoft Yahei;font-size:12pt;">的概率分布</span><span style="line-height:150%;font-size:12pt;">.</span><span style="line-height:150%;font-family:Microsoft Yahei;font-size:12pt;">设</span><span style="line-height:150%;font-size:12pt;"> <!--[if gte vml 1]><![endif]--> <!--[if !vml]--><img width="251" height="22" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image186.png"> <!--[endif]--></span><span style="line-height:150%;font-family:Microsoft Yahei;font-size:12pt;">，记</span><span style="line-height:150%;font-size:12pt;"> <!--[if gte vml 1]><![endif]--> <!--[if !vml]--><img width="73" height="40" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image188.png"> <!--[endif]--></span><span style="line-height:150%;font-size:12pt;">.</span><span style="line-height:150%;font-family:Microsoft Yahei;font-size:12pt;">则当</span><span style="line-height:150%;font-size:12pt;"> <!--[if gte vml 1]><![endif]--> <!--[if !vml]--><img width="12" height="12" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image190.png"> <!--[endif]--></span><span style="line-height:150%;font-size:12pt;"><span> </span><span> </span></span><span style="line-height:150%;font-family:Microsoft Yahei;font-size:12pt;">充分大时，有</span><span style="line-height:150%;font-size:12pt;"> <!--[if gte vml 1]><![endif]--> <!--[if !vml]--><img width="14" height="22" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image192.png"> <!--[endif]--></span><span style="line-height:150%;font-family:Microsoft Yahei;font-size:12pt;">的分布近似于（</span><span style="line-height:150%;font-size:12pt;"> </span><span style="line-height:150%;font-family:Microsoft Yahei;font-size:12pt;">）</span><span style="line-height:150%;font-size:12pt;"> </span></p>
- 2024-03-05 [单选] <p class="MsoNormal">7、<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</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative; top:5.0pt;mso-text-raise:-5.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1258" type="#_x0000_t75" style='width:26.4pt;height:15.6pt' o:ole=""> <v:imagedata src="xxdsb08.files/image397.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="35" height="21" v:shapes="_x0000_i1258" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image398.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1258" DrawAspect="Content" ObjectID="_1604819214"> </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"">相互独立，且</span><span lang="EN-US" style="font-size:12.0pt"><span style="position:relative; top:6.0pt;mso-text-raise:-6.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1259" type="#_x0000_t75" style='width:138pt;height:19.2pt' o:ole=""> <v:imagedata src="xxdsb08.files/image399.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="184" height="26" v:shapes="_x0000_i1259" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image400.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1259" DrawAspect="Content" ObjectID="_1604819215"> </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"">则下列结论正确的是（</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"> <o:p></o:p></span></p>
- 2024-03-05 [单选] <p class="MsoNormal" style="line-height:150%">8、<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"">已知随机变量</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_i1069" type="#_x0000_t75" style='width:14.4pt;height:12.6pt' o:ole=""> <v:imagedata src="xxdsb08.files/image087.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="19" height="17" v:shapes="_x0000_i1069" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image002.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1069" DrawAspect="Content" ObjectID="_1604819024"> </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"">的概率密度为</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_i1070" type="#_x0000_t75" style='width:31.8pt;height:18.6pt' o:ole=""> <v:imagedata src="xxdsb08.files/image088.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="42" height="25" v:shapes="_x0000_i1070" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image089.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1070" DrawAspect="Content" ObjectID="_1604819025"> </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"">，令</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_i1071" type="#_x0000_t75" style='width:45.6pt;height:12.6pt' o:ole=""> <v:imagedata src="xxdsb08.files/image090.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="61" height="17" v:shapes="_x0000_i1071" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image091.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1071" DrawAspect="Content" ObjectID="_1604819026"> </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"">，则</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_i1072" type="#_x0000_t75" style='width:11.4pt;height:12.6pt' o:ole=""> <v:imagedata src="xxdsb08.files/image092.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="15" height="17" v:shapes="_x0000_i1072" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image093.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1072" DrawAspect="Content" ObjectID="_1604819027"> </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"">的概率密度</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><span style="mso-spacerun:yes"> </span><span style="position:relative; top:6.0pt;mso-text-raise:-6.0pt"> <!--[if gte vml 1]><v:shape id="_x0000_i1073" type="#_x0000_t75" style='width:30.6pt;height:18.6pt' o:ole=""> <v:imagedata src="xxdsb08.files/image094.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="41" height="25" v:shapes="_x0000_i1073" src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image095.png"> <!--[endif]--></span> <!--[if gte mso 9]><xml _tmplitem="2" > <o:OLEObject Type="Embed" ProgID="Equation.DSMT4" ShapeID="_x0000_i1073" DrawAspect="Content" ObjectID="_1604819028"> </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"">为（</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%"> <o:p></o:p></span></p> <p class="MsoNormal"><span lang="EN-US" style="mso-bidi-font-size:10.5pt"> <o:p> </o:p></span></p>