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【单选题】
如果(X,Y)是连续型随机变量,下列条件中不是X与Y相互独立的充要条件的是( ),其中 为任意实数.A.
;
B.
;
C.
;
D.
.
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举一反三
【单选题】听力原文：M: I guess you must be able to speak several dialects since you have visited so many places these years. W: I wish I could, but Cantonese and Hokkien are the only dialects I've ever learned to sp...
A.
She can speak many dialects except for Cantonese and Hokkien.
B.
She has never learned Cantonese or Hokkien.
C.
She can speak neither Cantonese nor Hokkien.
D.
She can speak either Cantonese or Hokkien.
【单选题】-I hear that you have a brother, but I have never seen him. -He the hometown since many years ago.
A.
left
B.
has left
C.
was away from
D.
has been away from
【简答题】#include void str_cat(char s1[],char s2[]) { int i,j; i=0; while( 1 ) i++; j=0; while( 2 ) { 3 ; i++; 4 ; } s1[i]='\0'; } void main() { char s1[40],s2[20]; cin.getline(s1,20); cin.getline(s2,19); 5 ; ...
【简答题】Since you have never been to that city, you might as well make a (reserve)_______________ for your hotel.
【单选题】听力原文：W：Since you have made so many business trips，you must have visited many places in the country． M：I wish I．had，but Shenzhen and Beijing are the only places I've ever been to． Q：What does the man m...
A.
He has ever visited no more than two cities.
B.
He has made only a few business trips.
C.
He has never been to Shenzhen and Beijing.
D.
He has been to ninny small cities.
【单选题】#include void str_cat(char s1[],char s2[]) { int i,j; i=0; while( 1 ) i++; j=0; while( 2 ) { 3 ; i++; 4 ; } s1[i]='\0'; } void main() { char s1[40],s2[20]; cin.getline(s1,20); cin.getline(s2,19); 5 ; ...
A.
s1[i]!='\0' s2[j]=='\0' s1[i]=s2[j] j++; str_cat(s1,s2)
B.
s1[i]!='\0' s2[j]!='\0' s1[i]==s2[j] j++; str_cat(s1,s2)
C.
s1[i]!='\0' s2[j]!='\0' s1[i]=s2[j] j--; str_cat(s1,s2)
D.
s1[i]!='\0' s2[j]!='\0' s1[i]=s2[j] j++; str_cat(s1,s2)
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