【判断题】【消耗次数：1】
凡一定时期内，每期均有付款的现金流量都属于年金。（）
①
正确
②
错误
参考答案：
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相关题目
随机题目
【单选题】
已知<imgwidth="136"height="84"v:shapes="_x0000_i1289"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image325.png">是正定矩阵，则（）
①
<imgwidth="86"height="46"v:shapes="_x0000_i1290"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image327.png">
②
<imgwidth="74"height="46"v:shapes="_x0000_i1291"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image329.png">
③
<imgwidth="86"height="48"v:shapes="_x0000_i1292"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image331.png">
④
<imgwidth="74"height="48"v:shapes="_x0000_i1293"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image333.png">
【单选题】
一枚硬币投掷两次，令<imgwidth="32"height="25"v:shapes="_x0000_i1040"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image032.png">“第<imgwidth="9"height="17"v:shapes="_x0000_i1041"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image034.png">次正面朝上”<imgwidth="55"height="21"v:shapes="_x0000_i1042"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image036.png">，则“至多有一次正面朝上可表示为（）
①
<imgwidth="80"height="26"v:shapes="_x0000_i1043"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image038.png">
②
<imgwidth="33"height="26"v:shapes="_x0000_i1044"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image040.png">
③
<imgwidth="35"height="27"v:shapes="_x0000_i1045"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image042.png">
④
<imgwidth="50"height="25"v:shapes="_x0000_i1046"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image044.png">
【单选题】
在下列结果中，构成概率分布的是（）
①
<imgwidth="194"height="41"v:shapes="_x0000_i1163"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image226.png">
②
<imgwidth="212"height="41"v:shapes="_x0000_i1164"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image228.png">
③
<imgwidth="180"height="41"v:shapes="_x0000_i1165"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image230.png">
④
<imgwidth="184"height="41"v:shapes="_x0000_i1166"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image232.png">
【单选题】
若<imgwidth="56"height="22"v:shapes="_x0000_i1197"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image240.png">，则<imgwidth="16"height="18"v:shapes="_x0000_i1198"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image220.png">的特征值为（）
①
<imgwidth="22"height="18"v:shapes="_x0000_i1199"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image242.png">或<imgwidth="10"height="18"v:shapes="_x0000_i1200"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image244.png">
②
<imgwidth="14"height="20"v:shapes="_x0000_i1201"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image246.png">或<imgwidth="10"height="18"v:shapes="_x0000_i1202"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image244.png">
③
<imgwidth="14"height="20"v:shapes="_x0000_i1203"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image246.png">
④
<imgwidth="10"height="18"v:shapes="_x0000_i1204"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image244.png">
【单选题】
袋中有5个球（3新2旧），每次取1个，无放回的抽取2次，则第2次取到新球的概率为（）
①
<imgwidth="14"height="41"v:shapes="_x0000_i1215"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image315.png">
②
<imgwidth="16"height="41"v:shapes="_x0000_i1216"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image317.png">
③
<imgwidth="16"height="41"v:shapes="_x0000_i1217"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image319.png">
④
<imgwidth="21"height="41"v:shapes="_x0000_i1218"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image321.png">
【单选题】
设<imgwidth="75"height="22"v:shapes="_x0000_i1220"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image314.png">是来自正态总体<imgwidth="60"height="22"v:shapes="_x0000_i1221"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image290.png">的样本，则<imgwidth="98"height="40"v:shapes="_x0000_i1222"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image316.png">服从的分布为（）
①
<imgwidth="37"height="22"v:shapes="_x0000_i1223"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image318.png">
②
<imgwidth="58"height="22"v:shapes="_x0000_i1224"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image320.png">
③
<imgwidth="63"height="40"v:shapes="_x0000_i1225"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image321.png">
④
<imgwidth="63"height="40"v:shapes="_x0000_i1226"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb10.files/image321.png">
【单选题】
已知<imgwidth="18"height="18"v:shapes="_x0000_i1285"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image110.png">是<imgwidth="14"height="16"v:shapes="_x0000_i1286"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image264.png">阶方阵，且<imgwidth="70"height="28"v:shapes="_x0000_i1287"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image305.png">，则<imgwidth="18"height="18"v:shapes="_x0000_i1288"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image110.png">的<imgwidth="14"height="16"v:shapes="_x0000_i1289"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image264.png">个行向量中（）
①
任意<imgwidth="14"height="14"v:shapes="_x0000_i1290"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image362.png">个行向量线性无关
②
必有<imgwidth="14"height="14"v:shapes="_x0000_i1291"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image362.png">个行向量线性无关
③
任一行向量都可由其余<imgwidth="36"height="18"v:shapes="_x0000_i1292"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image364.png">个行向量线性表出
④
任意<imgwidth="14"height="14"v:shapes="_x0000_i1293"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image362.png">个行向量都为极大无关组
【单选题】
设<imgwidth="18"height="18"v:shapes="_x0000_i1203"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image189.png">和<imgwidth="18"height="18"v:shapes="_x0000_i1204"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image190.png">是<imgwidth="14"height="16"v:shapes="_x0000_i1205"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image188.png">阶矩阵，则下列命题成立的是（）
①
<imgwidth="18"height="18"v:shapes="_x0000_i1206"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image189.png">和<imgwidth="18"height="18"v:shapes="_x0000_i1207"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image190.png">等价则<imgwidth="18"height="18"v:shapes="_x0000_i1208"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image189.png">和<imgwidth="18"height="18"v:shapes="_x0000_i1209"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image190.png">相似
②
<imgwidth="18"height="18"v:shapes="_x0000_i1210"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image189.png">和<imgwidth="18"height="18"v:shapes="_x0000_i1211"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image190.png">相似则<imgwidth="18"height="18"v:shapes="_x0000_i1212"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image189.png">和<imgwidth="18"height="18"v:shapes="_x0000_i1213"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image190.png">等价
③
<imgwidth="18"height="18"v:shapes="_x0000_i1214"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image189.png">和<imgwidth="18"height="18"v:shapes="_x0000_i1215"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image190.png">等价则<imgwidth="18"height="18"v:shapes="_x0000_i1216"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image189.png">和<imgwidth="18"height="18"v:shapes="_x0000_i1217"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image190.png">合同
④
<imgwidth="18"height="18"v:shapes="_x0000_i1218"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image189.png">和<imgwidth="18"height="18"v:shapes="_x0000_i1219"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image190.png">相似则<imgwidth="18"height="18"v:shapes="_x0000_i1220"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image189.png">和<imgwidth="18"height="18"v:shapes="_x0000_i1221"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds05.files/image190.png">合同
【单选题】
设随机变量<imgwidth="90"height="25"v:shapes="_x0000_i1078"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image084.png">，则<imgwidth="74"height="19"v:shapes="_x0000_i1079"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image086.png">服从（）
①
<imgwidth="64"height="25"v:shapes="_x0000_i1080"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image088.png">
②
<imgwidth="48"height="21"v:shapes="_x0000_i1081"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image090.png">
③
<imgwidth="80"height="41"v:shapes="_x0000_i1082"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image092.png">
④
<imgwidth="108"height="25"v:shapes="_x0000_i1083"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image094.png">
【单选题】
下列结论正确的是（）
①
奇异矩阵经过若干次初等变换可以化为非奇异阵
②
非奇异阵经过若干次初等变换可以化为奇异矩阵
③
非奇异等价于单位阵
④
<imgwidth="214"height="22"v:shapes="图片_x0020_120"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image127.png">