【单选题】【消耗次数：1】
<imgwidth="19"height="17"v:shapes="_x0000_i1194"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image262.png">为连续型随机变量，<imgwidth="36"height="21"v:shapes="_x0000_i1195"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image288.png">为其概率密度函数，则（）
①
<imgwidth="83"height="21"v:shapes="_x0000_i1196"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image290.png">
②
<imgwidth="56"height="21"v:shapes="_x0000_i1197"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image292.png">
③
<imgwidth="112"height="21"v:shapes="_x0000_i1198"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image294.png">
④
<imgwidth="59"height="21"v:shapes="_x0000_i1199"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image296.png">
参考答案：
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相关题目
【单选题】
设<imgwidth="32"height="21"v:shapes="_x0000_i1056"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image046.png">为两个随机事件，且<imgwidth="73"height="21"v:shapes="_x0000_i1057"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image048.png">，则<imgwidth="80"height="21"v:shapes="_x0000_i1058"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image050.png">（）
①
<imgwidth="37"height="21"v:shapes="_x0000_i1059"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image052.png">
②
<imgwidth="48"height="21"v:shapes="_x0000_i1060"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image054.png">
③
<imgwidth="66"height="21"v:shapes="_x0000_i1061"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image056.png">
④
1
【单选题】
设<imgwidth="90"height="25"v:shapes="_x0000_i1095"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image084.png">，则<imgwidth="73"height="44"v:shapes="_x0000_i1096"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image112.png">~（）
①
<imgwidth="64"height="25"v:shapes="_x0000_i1097"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image113.png">
②
<imgwidth="48"height="21"v:shapes="_x0000_i1098"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image114.png">
③
<imgwidth="80"height="41"v:shapes="_x0000_i1099"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image116.png">
④
<imgwidth="108"height="25"v:shapes="_x0000_i1100"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image117.png">
【单选题】
设函数<imgwidth="36"height="21"v:shapes="_x0000_i1221"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image288.png">在区间<imgwidth="36"height="21"v:shapes="_x0000_i1222"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image340.png">上等于<imgwidth="35"height="19"v:shapes="_x0000_i1223"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image342.png">,而在此区间外等于0;若<imgwidth="36"height="21"v:shapes="_x0000_i1224"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image288.png">可以作为某连续随机变量的概率密度函数,则区间<imgwidth="36"height="21"v:shapes="_x0000_i1225"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image340.png">为（）
①
<imgwidth="40"height="41"v:shapes="_x0000_i1226"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image344.png">
②
<imgwidth="37"height="21"v:shapes="_x0000_i1227"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image346.png">
③
<imgwidth="54"height="42"v:shapes="_x0000_i1228"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image348.png">
④
<imgwidth="48"height="42"v:shapes="_x0000_i1229"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image350.png">
【单选题】
已知随机变量<imgwidth="77"height="21"v:shapes="_x0000_i1134"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image174.png">，则随机变量<imgwidth="73"height="17"v:shapes="_x0000_i1135"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image176.png">的概率密度<imgwidth="54"height="25"v:shapes="_x0000_i1136"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image178.png">（）
①
<imgwidth="131"height="49"v:shapes="_x0000_i1137"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image180.png">
②
<imgwidth="123"height="49"v:shapes="_x0000_i1138"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image182.png">
③
<imgwidth="88"height="49"v:shapes="_x0000_i1139"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image184.png">
④
<imgwidth="123"height="49"v:shapes="_x0000_i1140"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image186.png">
【单选题】
如果函数<imgwidth="136"height="48"v:shapes="_x0000_i1180"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image260.png">是某连续型随机变量<imgwidth="19"height="17"v:shapes="_x0000_i1181"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image262.png">的概率密度,则区间<imgwidth="37"height="27"v:shapes="_x0000_i1182"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image264.png">可以是（）
①
<imgwidth="33"height="27"v:shapes="_x0000_i1183"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image266.png">
②
<imgwidth="37"height="27"v:shapes="_x0000_i1184"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image268.png">
③
<imgwidth="54"height="32"v:shapes="_x0000_i1185"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image270.png">
④
<imgwidth="33"height="27"v:shapes="_x0000_i1186"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image272.png">
【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】
设随机变量X的概率密度函数为<imgwidth="36"height="21"v:shapes="_x0000_i1112"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image139.png">，且<imgwidth="88"height="27"v:shapes="_x0000_i1113"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image141.png">，则必有（）
①
<imgwidth="36"height="21"v:shapes="_x0000_i1114"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image139.png">在<imgwidth="50"height="27"v:shapes="_x0000_i1115"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image144.png">内大于零
②
<imgwidth="36"height="21"v:shapes="_x0000_i1116"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image139.png">在<imgwidth="50"height="27"v:shapes="_x0000_i1117"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image147.png">内小于零
③
<imgwidth="90"height="35"v:shapes="_x0000_i1118"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image149.png">
④
<imgwidth="36"height="21"v:shapes="_x0000_i1119"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image139.png">在<imgwidth="50"height="27"v:shapes="_x0000_i1120"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image144.png">上单调增加
【单选题】
设离散的随机变量X的分布为<imgwidth="222"height="27"v:shapes="_x0000_i1155"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image211.png">则<imgwidth="27"height="19"v:shapes="_x0000_i1156"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image213.png">（）
①
<imgwidth="32"height="19"v:shapes="_x0000_i1157"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image215.png">
②
任意正实数
③
<imgwidth="35"height="41"v:shapes="_x0000_i1158"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image217.png">
④
<imgwidth="35"height="41"v:shapes="_x0000_i1159"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image219.png">
【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">（）
①
1
②
<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">
随机题目
【简答题】
举例说明语言演变的特点。
【简答题】
现代汉语的特点。
【单选题】
下面哪句出自李白《宣州谢朓楼饯别校书叔云》？
①
飞流直下三千尺，疑是银河落九天。
②
长风万里送秋雁，对此可以酣高楼。
③
两岸青山相对出，孤帆一片日边来。
④
两岸猿声啼不住，轻舟已过万重山。