【单选题】【消耗次数：1】
“烹饪”一词最早出自于哪本著作
①
易经
②
诗经
③
楚辞
④
茶经
参考答案：
复制
纠错
相关题目
随机题目
【单选题】
<imgwidth="361"height="296"v:shapes="_x0000_i1281"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image439.png">
①
<imgwidth="21"height="41"v:shapes="_x0000_i1282"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image441.png">
②
<imgwidth="21"height="41"v:shapes="_x0000_i1283"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image443.png">
③
<imgwidth="21"height="41"v:shapes="_x0000_i1284"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image445.png">
④
<imgwidth="21"height="41"v:shapes="_x0000_i1285"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image447.png">
【单选题】
设随机变量<imgwidth="90"height="21"v:shapes="_x0000_i1067"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image084.png">，则<imgwidth="77"height="21"v:shapes="_x0000_i1068"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image086.png">（）
①
0.0016
②
0.0272
③
0.4096
④
0.8192
【单选题】
矩阵（）是二次型<imgwidth="112"height="28"v:shapes="_x0000_i1332"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image402.png">的矩阵
①
<imgwidth="58"height="58"v:shapes="_x0000_i1333"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image404.png">
②
<imgwidth="58"height="58"v:shapes="_x0000_i1334"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image406.png">
③
<imgwidth="58"height="58"v:shapes="_x0000_i1335"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image408.png">
④
<imgwidth="58"height="58"v:shapes="_x0000_i1336"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image410.png">
【单选题】
设<imgwidth="16"height="20"v:shapes="_x0000_i1143"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image129.png">是可逆矩阵<imgwidth="18"height="18"v:shapes="_x0000_i1144"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image091.png">的一个特征值，则<imgwidth="18"height="18"v:shapes="_x0000_i1145"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image091.png">的伴随矩阵<imgwidth="22"height="22"v:shapes="_x0000_i1146"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image131.png">必有一个特征值为（）
①
<imgwidth="78"height="48"v:shapes="_x0000_i1147"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image133.png">
②
<imgwidth="58"height="48"v:shapes="_x0000_i1148"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image135.png">
③
<imgwidth="56"height="20"v:shapes="_x0000_i1149"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image137.png">
④
<imgwidth="74"height="32"v:shapes="_x0000_i1150"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image139.png">
【单选题】
设随机变量X的方差<imgwidth="144"height="25"v:shapes="_x0000_i1025"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image002.png">，则X的数学期望<imgwidth="54"height="21"v:shapes="_x0000_i1026"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image004.png">（）
①
16
②
20
③
4
④
<imgwidth="33"height="25"v:shapes="_x0000_i1027"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image006.png">
【单选题】
随机变量<imgwidth="13"height="21"v:shapes="_x0000_i1042"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image036.png">的概率密度<imgwidth="132"height="50"v:shapes="_x0000_i1043"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image038.png">则常数<imgwidth="29"height="19"v:shapes="_x0000_i1044"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image040.png">（）
①
1
②
2
③
<imgwidth="17"height="41"v:shapes="_x0000_i1045"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image042.png">
④
<imgwidth="17"height="41"v:shapes="_x0000_i1046"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image044.png">
【单选题】
非齐次线性方程组<imgwidth="186"height="58"v:shapes="_x0000_i1165"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image192.png">有解的充要条件是（）
①
<imgwidth="52"height="48"v:shapes="_x0000_i1166"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image194.png">
②
<imgwidth="52"height="48"v:shapes="_x0000_i1167"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image196.png">
③
难确定
④
<imgwidth="14"height="20"v:shapes="_x0000_i1168"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image198.png">任意非零实数
【单选题】
<imgwidth="210"height="114"v:shapes="图片_x0020_8"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image008.png">
①
<imgwidth="59"height="28"v:shapes="图片_x0020_9"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image009.png">
②
<imgwidth="77"height="40"v:shapes="图片_x0020_10"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image010.png">
③
<imgwidth="57"height="37"v:shapes="图片_x0020_11"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image011.png">
④
<imgwidth="40"height="38"v:shapes="图片_x0020_12"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image012.png">
【单选题】
在假设检验中，关于两个正态总体方差的检验，检验采用的方法为（）
①
<imgwidth="12"height="18"v:shapes="_x0000_i1342"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image452.png">检验法
②
<imgwidth="12"height="18"v:shapes="_x0000_i1343"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image454.png">检验法
③
<imgwidth="21"height="25"v:shapes="_x0000_i1344"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image456.png">检验法
④
<imgwidth="21"height="25"v:shapes="_x0000_i1345"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image456.png">检验法
【单选题】
<imgwidth="13"height="21"v:shapes="_x0000_i1174"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image254.png">与<imgwidth="13"height="17"v:shapes="_x0000_i1175"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image256.png">的相关系数<imgwidth="50"height="26"v:shapes="_x0000_i1176"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image258.png">，表示<imgwidth="13"height="21"v:shapes="_x0000_i1177"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image254.png">与<imgwidth="13"height="17"v:shapes="_x0000_i1178"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image256.png">（）
①
相互独立
②
不线性相关
③
存在常数<imgwidth="27"height="21"v:shapes="_x0000_i1179"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image260.png">使<imgwidth="116"height="27"v:shapes="_x0000_i1180"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image262.png">
④
满足<imgwidth="164"height="29"v:shapes="_x0000_i1181"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb09.files/image264.png">