【单选题】【消耗次数:1】
Slavicek头影测量分析在进行前牙分析时有很多参考点,其中,代表前牙切导止点的是()
F1
F2
F3
S
N
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相关题目
【多选题】 设函数f: N?N, f(x)=2x+1,则它是:
①  满射;
②  单射;
③  双射;
④  函数.
【单选题】 三个力F1,F2,F3的大小均不等于零,其中F1和F2沿同一作用线,刚体处于()。
①  平衡状态
②  不平衡状态
③  可能平衡,也可能不平衡
【单选题】 设M={x|f1(x)=0},N={x|f2(x)=0},则方程f1(x)·f2(x)=0的解为(   )
①  M∩N
②  M∪N
③  MN
④  M-N
【单选题】 以下程序的输出结果是_______? f(int b[],int m,int n) { int i,s=0; for(i=m;in;i=i+2) s=s+b[i]; return s; } int main() { int x,a[]={1,2,3,4,5,6,7,8,9}; x=f(a,3,7); printf(%d\n,x); }
①  7
②  8
③  9
④  10
【简答题】 设函数f: N?N, f(x)=2x+1,试求其单满双射性质。
【单选题】 已知f1和f2是同一类的两个成员方法,但f1不能直接调用f2,这说明()
①  f1和f2都是静态方法
②  f1不是静态方法,f2是静态方法
③  f1是静态方法,f2不是静态方法
④  f1和f2都不是静态方法
【单选题】 已知f1和f2是同一类的两个成员函数,但f1不能直接调用f2,这说明()
①  f1和f2都是静态函数
②  f1不是静态函数,f2是静态函数
③  f1是静态函数,f2不是静态函数
④  f1和f2都不是静态函数
【单选题】 代表颅底曲度的头影测量数据是()
①  SNA角
②  SNB角
③  SNC角
④  蝶鞍角
⑤  下颌角
【单选题】 设连续型随机变量X的密度函数有f(x)=f(-x),F(X)是X的分布函数,则下列成立的有(A)F(-a)=F(a); (B)F(-a)=(1/2)F(a);(C)F(-a)=1-F(a);(D)F(-a)=(1/2)-F(a).
①  (A)
②  (B)
③  (C)
④  (D)
【单选题】 若f(t)=t^3+1,则f(t^3+1)= ( )
①  t^3+1
②  t^6+2
③  t^9+2
④  t^9+3t^6+3t^3+2
随机题目
【单选题】 <imgwidth="16"height="17"v:shapes="_x0000_i1037"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image012.png">之积为不可能事件,则称<imgwidth="16"height="17"v:shapes="_x0000_i1038"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image010.png">与<imgwidth="16"height="17"v:shapes="_x0000_i1039"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image012.png">()
①  相互独立
②  互不相容
③  对立
④  构成完备事件组
【单选题】 设<imgwidth="110"height="21"v:shapes="_x0000_i1082"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image113.png">是连续型随机变量<imgwidth="19"height="17"v:shapes="_x0000_i1083"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image002.png">的分布函数,则下列结论中不正确的是()
①  <imgwidth="36"height="21"v:shapes="_x0000_i1084"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image115.png">不是不减函数
②  <imgwidth="36"height="21"v:shapes="_x0000_i1085"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image115.png">是不减函数
③  <imgwidth="36"height="21"v:shapes="_x0000_i1086"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image115.png">是右连续的
④  <imgwidth="143"height="21"v:shapes="_x0000_i1087"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image117.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()
①  <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】 下列各函数中是随机变量分布函的为()
①  <imgwidth="179"height="41"v:shapes="_x0000_i1211"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image319.png">
②  <imgwidth="132"height="69"v:shapes="_x0000_i1212"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image321.png">
③  <imgwidth="160"height="26"v:shapes="_x0000_i1213"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image323.png">
④  <imgwidth="240"height="41"v:shapes="_x0000_i1214"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image325.png">
【单选题】 <imgwidth="466"height="185"v:shapes="图片_x0020_1"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image388.png">
①  <imgwidth="90"height="42"v:shapes="_x0000_i1254"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image390.png">
②  <imgwidth="88"height="22"v:shapes="_x0000_i1255"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image392.png">
③  <imgwidth="90"height="42"v:shapes="_x0000_i1256"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image394.png">
④  <imgwidth="90"height="42"v:shapes="_x0000_i1257"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb08.files/image396.png">
【单选题】 对于正态分布<imgwidth="84"height="22"v:shapes="_x0000_i1400"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image525.png">,抽取容量为10的样本,算得样本均值<imgwidth="63"height="20"v:shapes="_x0000_i1401"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image527.png">,样本方差<imgwidth="81"height="20"v:shapes="_x0000_i1402"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image529.png">,给定显著水平<imgwidth="60"height="18"v:shapes="_x0000_i1403"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image531.png">,检验假设<imgwidth="75"height="22"v:shapes="_x0000_i1404"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image533.png"><imgwidth="35"height="22"v:shapes="_x0000_i1405"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image535.png"><imgwidth="58"height="18"v:shapes="_x0000_i1406"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image537.png">.则正确的方法和结论是()
①  用<imgwidth="12"height="14"v:shapes="_x0000_i1407"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image539.png">检验法,查临界值表知<imgwidth="78"height="22"v:shapes="_x0000_i1408"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image541.png">,拒绝<imgwidth="22"height="22"v:shapes="_x0000_i1409"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image465.png">
②  用<imgwidth="12"height="14"v:shapes="_x0000_i1410"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image539.png">检验法,查临界值表知<imgwidth="75"height="22"v:shapes="_x0000_i1411"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image544.png">,拒绝<imgwidth="22"height="22"v:shapes="_x0000_i1412"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image465.png">
③  用<imgwidth="12"height="14"v:shapes="_x0000_i1413"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image546.png">检验法,查临界值表知<imgwidth="102"height="22"v:shapes="_x0000_i1414"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image548.png">,拒绝<imgwidth="22"height="22"v:shapes="_x0000_i1415"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image465.png">
④  用<imgwidth="12"height="14"v:shapes="_x0000_i1416"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image546.png">检验法,查临界值表知<imgwidth="84"height="22"v:shapes="_x0000_i1417"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image550.png">,拒绝<imgwidth="22"height="22"v:shapes="_x0000_i1418"src="http://wljy.whut.edu.cn:80/uploadfiles/word/xxdsb11.files/image465.png">
【单选题】 <imgwidth="526"height="53"v:shapes="图片_x0020_151"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image149.png">
①  <imgwidth="51"height="28"v:shapes="图片_x0020_152"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image150.png">
②  <imgwidth="66"height="22"v:shapes="图片_x0020_153"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image151.png">
③  <imgwidth="46"height="23"v:shapes="图片_x0020_154"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image152.png">
④  <imgwidth="46"height="22"v:shapes="图片_x0020_155"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image153.png">
【单选题】 小王后还剩52张牌中一张一张有放回地取4张,则恰有3张是黑桃的概率为()
①  <imgwidth="48"height="48"v:shapes="_x0000_i1087"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image122.png">
②  <imgwidth="84"height="49"v:shapes="_x0000_i1088"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image124.png">
③  <imgwidth="64"height="48"v:shapes="_x0000_i1089"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image126.png">
④  <imgwidth="61"height="48"v:shapes="_x0000_i1090"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image128.png">
【单选题】 向量空间<imgwidth="216"height="28"src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAQ4AAAAjCAYAAABl9OT5AAAAAXNSR0ICQMB9xQAAAAlwSFlzAAASdAAAEnQB3mYfeAAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAAXuSURBVHja7Vw9btw6EOYBcoAXYJnOB7C5Lv2qYCMEqYOsBVcOUgUEghxAdmcg8AXSpUuK1C6SNk1u4CI38B3yTOpR0sr8mSGpFWVM8QH2WitLMx+/+eFI7PLykhEIBAIGZAQCgUDCQSAQSDgIBAIJB4FAIOEgFI+rq3dPqhX7yRj7a4OoL16Vfg8XtXjVXbM4/UJ+JeEgTIymOXsqRN28u7p60sjqkPPqm/pZ/227PTxrmqdLuP7uZ8b+LEHsSDgIjwbvN/wj37z/uKRrvpDyHyN0CqeCfSHhIOEg7BFLX3RK+KhUIeFIgqyP33DObkMLQdf4QnyqZHP46MqQ+9JDiOrTMCL7Uv4jdvSj9NLE6UPTpwEIhy7JxOk1LfCIsvC+FHwmXnzeyuYALBzmiw+baOKPIZz1mD1HARU5GT/6/VzKkxCBVqvVr+NavlmmOFYvjzj7rW18f7828ZMb8VbdY0gYdYNx5mgdatSGfKUFgbG7ULlFwhFva/W9U8GvGeN3Pk45o7kRDJvy6OilCX1/8lq+3GvNqzvsvZD5ScZvl5ppmJ0E49zWJ/zOlmGpY0P3WlKZoksOxa9V9bNr1MrtgSG6b9FDyhUSjnRb6+A8+A5IOIyyuxzUXkx48U6mop4bGh63tEagz/59BLHb3eeT0soUV+bQZ7NubkEyJxKOdFu3gcuddaCFI3TC/aRfftHSiyggLkuIEuMMwXxuE0SfWOpspaCmouv+ev/a+aX/zvm3EPdIONJt7fqeVzhMmvxApf4XlDlTXp1CeYTLKOlSsw2fQ7tBKIcojrOOB3Vugpiqfsua8xt7zQzPPn3ib4uCXaqtAQtYSxeOuWyNWWdgleouYubIFVJCs7h84qZqvBfi2WfVFxgepxqNOq2LIJ1ytjqnamIOHdEJGfCcXbZnc7bnbz7BTxdrfq2bsxn6WR1hLTzqRCKRY1DhKJEHJdgaktmDo3op6X+oVApmJN3i243CO5ENSdz2f9rHuCF1ey7hCPWmou2d0e82cTMLODUrwghHiTwoydbo5qgtVYbuZDhVDQhIpNQ35HAotAeySxy1M1SdD0exY0sMQxxrIwo4b9E/l+ETDrswYkUKmurmLE3Hi6vzPV/f5Nqhw5QqpfCgNFuH1nxw8ZXyfIC6rro6/qCGU1yO7RYOULVtW1W5Fd58DrVfSsaBEU74teym3Hn6Nw97GDn5he1xlMCDEm3dDlmub2wjGcHFp1Rr7kaj6aaHBrmwwpE7tbedD5NtlCkcg3TeCWQZNrSP+Sxjio4VjhJ4UKqtVWmjZrbGYuP9hyU9G9BmHLzxpZLR/YRMpLU5SzXaMFvX/T14dlUylGpzZBzepnvGLf5o4ZiRByXaGpVxdOTk/FZ9KeVGJutxOByMXTh1VZ0rMcpF2nHGo1PTjXwbW5ti5jhK73H4SBu6r6mFowQelGZrdI+jX+zzDHnB6sf4XZXOudvqX3XMePtWnp2dxEadIWFksz0w75HIEbEgoujbfkuzd7oQ+aL6JBEf2hwtiAcl2Rq9qzJFsyonUuY4dFRRzpTbw81Gvh4vUpWauaK82lsPPTE4VHq+Xn91EQByzvaY/lkg87t/PgX2EBg+A0qbLRjuNLB19X1MxuGgmlrwU2/HYnmA4QCGB6XaOmqOw7fdWQJSJke7NG1AqqGTbc3XNoVVW1jsNmQXaA0JPaeuMU3DDEDaKZ8hip1mdJWrToHO8ErDkHBgeYDhQI6+TQm2jpocLRWoZ1UyL6DhK+xCEQNKFug5MbZZ6qh9Tkw1co7xF4YHS8zslykce346Vu/oCNGEhAgzrwE95757ESQc6f7C8KBURD0du+QbGtf7qQ5UaWNV1eehulu/jQu4gwI9J64Zttx3j5QuHBh/YXhQMqLex7GImwK+AWyKZuFOI0s32Z6fzEWWtg9CorGPUqVkHuTMrKLfALYEYN45qlLM3Aur717bm6r7WiBqGhHS6SfhmHKhzcuDbHaLfecogUAgQEBGIBAIJBwEAoGEg0AgkHAQCITHgP8A0oBwyhcjZTYAAAAASUVORK5CYII="/>的维数等于()
①  0
②  1
③  2
④  3
【单选题】 设<imgwidth="48"height="26"v:shapes="_x0000_i1189"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image226.png">是<imgwidth="16"height="18"v:shapes="_x0000_i1190"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image220.png">的特征值且<imgwidth="54"height="22"v:shapes="_x0000_i1191"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image228.png">,则<imgwidth="26"height="28"v:shapes="_x0000_i1192"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image230.png">是()特征值
①  <imgwidth="28"height="18"v:shapes="_x0000_i1193"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image232.png">
②  <imgwidth="26"height="22"v:shapes="_x0000_i1194"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image234.png">
③  <imgwidth="22"height="22"v:shapes="_x0000_i1195"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image236.png">
④  <imgwidth="28"height="22"v:shapes="_x0000_i1196"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image238.png">