【判断题】【消耗次数：1】
创建筋特征时，在草绘时，截面可以是封闭的
①
正确
②
错误
参考答案：
复制
纠错
相关题目
随机题目
【单选题】
设总体<imgwidth="84"height="22"v:shapes="_x0000_i1356"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image412.png">，<imgwidth="20"height="20"v:shapes="_x0000_i1357"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image461.png">未知，<imgwidth="75"height="26"v:shapes="_x0000_i1358"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image476.png">是来自<imgwidth="12"height="14"v:shapes="_x0000_i1359"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image426.png">的样本，<imgwidth="12"height="20"v:shapes="_x0000_i1360"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image478.png">为样本均值，<imgwidth="12"height="14"v:shapes="_x0000_i1361"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image480.png">为样本标准差。是检验问题为<imgwidth="164"height="22"v:shapes="_x0000_i1362"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image482.png">则检验的统计量为（）
①
<imgwidth="135"height="35"v:shapes="_x0000_i1363"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image484.png">
②
<imgwidth="135"height="35"v:shapes="_x0000_i1364"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image486.png">
③
<imgwidth="135"height="37"v:shapes="_x0000_i1365"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image488.png">
④
<imgwidth="115"height="37"v:shapes="_x0000_i1366"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image490.png">
【单选题】
设随机变量<imgwidth="19"height="17"v:shapes="_x0000_i1256"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image266.png">的均值<imgwidth="68"height="21"v:shapes="_x0000_i1257"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image360.png">，方差<imgwidth="75"height="25"v:shapes="_x0000_i1258"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image362.png">，则<imgwidth="60"height="25"v:shapes="_x0000_i1259"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image364.png">（）
①
<imgwidth="54"height="25"v:shapes="_x0000_i1260"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image366.png">
②
<imgwidth="54"height="25"v:shapes="_x0000_i1261"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image368.png">
③
<imgwidth="41"height="18"v:shapes="_x0000_i1262"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image370.png">
④
<imgwidth="41"height="18"v:shapes="_x0000_i1263"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image372.png">
【单选题】
设<imgwidth="226"height="84"v:shapes="_x0000_i1188"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image228.png">，则线三条直线<imgwidth="142"height="84"v:shapes="_x0000_i1189"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image230.png"><imgwidth="28"height="26"v:shapes="_x0000_i1190"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image232.png"><imgwidth="184"height="30"v:shapes="_x0000_i1191"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image234.png">交于一点的充要条件是（）
①
<imgwidth="70"height="26"v:shapes="_x0000_i1192"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image226.png">线性相关
②
<imgwidth="70"height="26"v:shapes="_x0000_i1193"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image226.png">线性无关
③
秩<imgwidth="98"height="28"v:shapes="_x0000_i1194"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image236.png">秩<imgwidth="62"height="28"v:shapes="_x0000_i1195"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image238.png">
④
<imgwidth="70"height="26"v:shapes="_x0000_i1196"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image226.png">线性相关，<imgwidth="46"height="26"v:shapes="_x0000_i1197"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image240.png">线性无关
【单选题】
<imgwidth="444"height="30"v:shapes="图片_x0020_189"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image195.png">
①
<imgwidth="466"height="26"v:shapes="图片_x0020_190"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image196.png">
②
<imgwidth="198"height="25"v:shapes="图片_x0020_191"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image197.png">
③
<imgwidth="348"height="26"v:shapes="图片_x0020_192"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image198.png">
④
以上都不对
【单选题】
下列说法正确的是（）
①
<imgwidth="99"height="36"v:shapes="图片_x0020_5"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image005.png">
②
<imgwidth="101"height="36"v:shapes="图片_x0020_6"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image006.png">
③
<imgwidth="105"height="40"v:shapes="图片_x0020_7"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image007.png">
④
<imgwidth="116"height="37"v:shapes="图片_x0020_8"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image008.png">
【单选题】
有放回地抽取500件产品，<imgwidth="19"height="17"v:shapes="_x0000_i1061"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image002.png">表示抽到次品的件数，则<imgwidth="77"height="21"v:shapes="_x0000_i1062"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image074.png">（）
①
<imgwidth="55"height="48"v:shapes="_x0000_i1063"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image076.png">
②
<imgwidth="54"height="48"v:shapes="_x0000_i1064"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image078.png">
③
<imgwidth="128"height="26"v:shapes="_x0000_i1065"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image080.png">
④
<imgwidth="30"height="41"v:shapes="_x0000_i1066"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image082.png">
【单选题】
每张奖券中尾奖的概率为<imgwidth="21"height="41"v:shapes="_x0000_i1093"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image126.png">，某人购买了20张号码杂乱的奖券，则中尾奖的张数<imgwidth="19"height="17"v:shapes="_x0000_i1094"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image002.png">服从（）分布。
①
二项
②
泊松
③
指数
④
正态
【单选题】
设<imgwidth="18"height="18"v:shapes="_x0000_i1106"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image130.png">是<imgwidth="44"height="16"v:shapes="_x0000_i1107"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image132.png">矩阵，则齐次线性方程<imgwidth="54"height="20"v:shapes="_x0000_i1108"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image134.png">仅有零解的充分必要条件是（）
①
<imgwidth="18"height="18"v:shapes="_x0000_i1109"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image130.png">的行向量组线性无关
②
<imgwidth="18"height="18"v:shapes="_x0000_i1110"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image130.png">的行向量组线性相关
③
<imgwidth="18"height="18"v:shapes="_x0000_i1111"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image130.png">的列向量组线性无关
④
<imgwidth="18"height="18"v:shapes="_x0000_i1112"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image130.png">的列向量组线性相关
【单选题】
设随机变量X的期望<imgwidth="41"height="21"v:shapes="_x0000_i1042"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image028.png">和方差<imgwidth="42"height="21"v:shapes="_x0000_i1043"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image030.png">都存在，则对任意正数<imgwidth="13"height="15"v:shapes="_x0000_i1044"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image032.png">，有（）
①
<imgwidth="180"height="41"v:shapes="_x0000_i1045"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image034.png">
②
<imgwidth="180"height="41"v:shapes="_x0000_i1046"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image036.png">
③
<imgwidth="180"height="41"v:shapes="_x0000_i1047"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image038.png">
④
<imgwidth="180"height="41"v:shapes="_x0000_i1048"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image040.png">
【单选题】
称<imgwidth="86"height="22"v:shapes="_x0000_i1305"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image377.png">是来自总体<imgwidth="14"height="12"v:shapes="_x0000_i1306"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image341.png">的一个简单随机样本（简称样本），即<imgwidth="86"height="22"v:shapes="_x0000_i1307"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image377.png">满足（）
①
<imgwidth="86"height="22"v:shapes="_x0000_i1308"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image377.png">相互独立，不一定同分布
②
<imgwidth="86"height="22"v:shapes="_x0000_i1309"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image377.png">相互独立同分布，但与总体分布不一定相同
③
<imgwidth="86"height="22"v:shapes="_x0000_i1310"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image377.png">相互独立且均与总体同分布
④
<imgwidth="86"height="22"v:shapes="_x0000_i1311"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image377.png">与总体同分布，但不一定相互独立