3,7,12,15,9,-18,() A: -27 B: -45 C: -81 D: -102
3,7,12,15,9,-18,() A: -27 B: -45 C: -81 D: -102
设随机变量X~B(4,2/3),则P(X<1)=___________. A: 1/27 B: 8/27 C: 1/81 D: 8/81
设随机变量X~B(4,2/3),则P(X<1)=___________. A: 1/27 B: 8/27 C: 1/81 D: 8/81
Two competitors battle each other in each match of a tournament with nine participants. What is the minimum number of matches that must occur for every competitor to battle every other competitor() A: 27 B: 36 C: 45 D: 64 E: 81
Two competitors battle each other in each match of a tournament with nine participants. What is the minimum number of matches that must occur for every competitor to battle every other competitor() A: 27 B: 36 C: 45 D: 64 E: 81
某教授的H指数是27,表明他的27篇文章至少被引用多少次() A: 54 B: 27 C: 81 D: 108
某教授的H指数是27,表明他的27篇文章至少被引用多少次() A: 54 B: 27 C: 81 D: 108
设关系X、Y、Z各有3个元组,那么这三个关系的自然联接的元组个数( )。 A: 3 B: 9 C: 27 D: 81 E: 不确定(与计算结果有关) F: 小于等于81 G: 小于81
设关系X、Y、Z各有3个元组,那么这三个关系的自然联接的元组个数( )。 A: 3 B: 9 C: 27 D: 81 E: 不确定(与计算结果有关) F: 小于等于81 G: 小于81
将关键字(45,68,27,54,20,25)按从小到大排列,利用快速排序,以45为枢轴,进行第一次划分之后状态为( ) A: 25, 20, 27, 45, 54, 68 B: 20, 25, 27, 45, 54, 68 C: 20, 68, 27, 45, 54, 25 D: 25, 20, 27, 45, 68, 54
将关键字(45,68,27,54,20,25)按从小到大排列,利用快速排序,以45为枢轴,进行第一次划分之后状态为( ) A: 25, 20, 27, 45, 54, 68 B: 20, 25, 27, 45, 54, 68 C: 20, 68, 27, 45, 54, 25 D: 25, 20, 27, 45, 68, 54
用简便方法计算 (64× 75× 81) ÷(32× 25× 27)
用简便方法计算 (64× 75× 81) ÷(32× 25× 27)
9*1=9 9*2=18 9*3=27 9*4=36 9*5=45 9*6=54 9*7=63 9*8=72 9*9=81
9*1=9 9*2=18 9*3=27 9*4=36 9*5=45 9*6=54 9*7=63 9*8=72 9*9=81
81加135的和除以27,结果是( )。 A: 8 B: 86 C: 138 D: 68
81加135的和除以27,结果是( )。 A: 8 B: 86 C: 138 D: 68
Thegraphoff(x)=x<sup>2</sup>istranslated2unitsdownand4unitsleft.Iftheresultinggraphrepresentsg(x),theng(-5)=______. A: -1 B: 3 C: 45 D: 79 E: 81
Thegraphoff(x)=x<sup>2</sup>istranslated2unitsdownand4unitsleft.Iftheresultinggraphrepresentsg(x),theng(-5)=______. A: -1 B: 3 C: 45 D: 79 E: 81