【单选题】【消耗次数：1】
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<imgwidth="90"height="42"v:shapes="_x0000_i1257"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image396.png">
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【单选题】
<imgwidth="183"height="25"v:shapes="_x0000_i1194"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image285.png">，且<imgwidth="21"height="25"v:shapes="_x0000_i1195"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image287.png">与<imgwidth="22"height="25"v:shapes="_x0000_i1196"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image289.png">相互独立，则<imgwidth="68"height="25"v:shapes="_x0000_i1197"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image291.png">（）
①
<imgwidth="84"height="25"v:shapes="_x0000_i1198"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image293.png">
②
<imgwidth="92"height="25"v:shapes="_x0000_i1199"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image295.png">
③
<imgwidth="88"height="41"v:shapes="_x0000_i1200"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image297.png">
④
<imgwidth="96"height="41"v:shapes="_x0000_i1201"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image299.png">
【单选题】
设随机变量<imgwidth="13"height="15"v:shapes="_x0000_i1216"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image328.png">和<imgwidth="13"height="17"v:shapes="_x0000_i1217"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image330.png">的密度函数分别为<imgwidth="131"height="48"v:shapes="_x0000_i1218"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image332.png"><imgwidth="140"height="50"v:shapes="_x0000_i1219"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image334.png">若<imgwidth="13"height="15"v:shapes="_x0000_i1220"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image328.png">与<imgwidth="13"height="17"v:shapes="_x0000_i1221"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image330.png">相互独立，则<imgwidth="57"height="21"v:shapes="_x0000_i1222"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image336.png">（）
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1
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<imgwidth="16"height="41"v:shapes="_x0000_i1223"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image338.png">
③
<imgwidth="15"height="41"v:shapes="_x0000_i1224"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image340.png">
④
<imgwidth="16"height="41"v:shapes="_x0000_i1225"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image342.png">
【单选题】
设<imgwidth="90"height="25"v:shapes="_x0000_i1032"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image016.png">，则<imgwidth="87"height="21"v:shapes="_x0000_i1033"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image018.png">（）
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<imgwidth="83"height="21"v:shapes="_x0000_i1034"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image020.png">
②
<imgwidth="83"height="21"v:shapes="_x0000_i1035"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image022.png">
③
<imgwidth="136"height="42"v:shapes="_x0000_i1036"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image024.png">
④
<imgwidth="136"height="42"v:shapes="_x0000_i1037"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image026.png">
【单选题】
随机变量<imgwidth="19"height="17"v:shapes="_x0000_i1095"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image127.png">服从正态分布<imgwidth="50"height="21"v:shapes="_x0000_i1096"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image129.png">，则<imgwidth="75"height="21"v:shapes="_x0000_i1097"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image131.png">（）
①
<imgwidth="98"height="49"v:shapes="_x0000_i1098"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image133.png">
②
<imgwidth="64"height="44"v:shapes="_x0000_i1099"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image135.png">
③
<imgwidth="90"height="49"v:shapes="_x0000_i1100"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image137.png">
④
<imgwidth="90"height="49"v:shapes="_x0000_i1101"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image139.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】
设X是一随机变量，<imgwidth="17"height="25"v:shapes="_x0000_i1298"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image471.png">为任意实数，<imgwidth="41"height="21"v:shapes="_x0000_i1299"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image473.png">是<imgwidth="19"height="17"v:shapes="_x0000_i1300"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image316.png">的数学期望，则（）
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②
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③
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④
<imgwidth="100"height="26"v:shapes="_x0000_i1304"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image482.png">
【单选题】
设二维随机变量<imgwidth="187"height="26"v:shapes="_x0000_i1135"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image189.png">，且<imgwidth="19"height="17"v:shapes="_x0000_i1136"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image127.png">与<imgwidth="15"height="17"v:shapes="_x0000_i1137"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image185.png">相互独立，则（）
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<imgwidth="50"height="25"v:shapes="_x0000_i1138"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image191.png">
②
<imgwidth="115"height="26"v:shapes="_x0000_i1139"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image193.png">
③
<imgwidth="61"height="26"v:shapes="_x0000_i1140"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image195.png">
④
<imgwidth="40"height="21"v:shapes="_x0000_i1141"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image197.png">
【单选题】
二维随机变量<imgwidth="46"height="21"v:shapes="_x0000_i1113"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image159.png">概率密度为<imgwidth="203"height="50"v:shapes="_x0000_i1114"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image161.png">则常数<imgwidth="16"height="19"v:shapes="_x0000_i1115"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image163.png">为（）
①
<imgwidth="37"height="19"v:shapes="_x0000_i1116"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image165.png">
②
<imgwidth="42"height="41"v:shapes="_x0000_i1117"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image167.png">
③
<imgwidth="40"height="19"v:shapes="_x0000_i1118"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image169.png">
④
<imgwidth="39"height="19"v:shapes="_x0000_i1119"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image171.png">
【单选题】
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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】
在采访中，记者既要"身入"，又要"心入"。"心入"，就是要有强烈的社会责任感， 要对客观事物进行由表及里的分析，还要().
①
A.广泛地接触群众
②
B.多方面地挖掘材料
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C.细心地掂量各种材料的价值
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D.细心地掂量各种材料的价值
随机题目
【单选题】
医疗事放的责任主体是依法取得执业许可证的医疗机构及其依法取得（）
①
A.人学毕业证书的医学院校毕业生
②
B.医学教育资格的机构
③
C.执业证书的卫生技术人员了
④
D.考试合格取得资格的考生