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【判断题】
若X~N(0,2),Y~N(2,1),X,Y独立,则X-Y~N(-2,1).
【多选题】
设函数f: N?N, f(x)=2x+1,则它是:
【单选题】
设有定义:intn1=0,n2,*p=&n2,*q=&n1;,以下赋值语句中与n2=n1;语句等价的是()
【单选题】
已知点M(1,-2)、N(3,-1)和直线x+2y-1=0,则( )
【单选题】
下列程序的输出结果为( ). main( ) {intm=7,n=4; floata=38.4,b=6.4,x; x=m/2+n*a/b+1/2; printf(%f\n,x); }
【单选题】
已知点M(2,-1)、N(1,4)和直线 x+2y-1=0,则( )
【单选题】
设:inta=1,b=2,c=3,d=4,m=2,n=2;执行(m=a>b)&&(n=c>d)后n的值为()。
【多选题】
设集合L = {1, 2, 22, ..., 2n}, n?R+,对于整除关系不能构成:
【单选题】
设集合L = {1, 2, 22, ..., 2n}, n?R+,对于整除关系能够构成:
【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】
What do you think _____solve the problem ?
【单选题】
We need fifteen more people _____our team to do the job.
【单选题】
The pen ______she writes letters is broken.
【单选题】
He ________ Alice for ten years.
【单选题】
Don’t forget the day ______you were received into the Youth League.
【单选题】
---Are you going there with them ? ----If you go,__________.
【单选题】
_____your help, everything in the room is in good order now.
【单选题】
Ahead of me I saw a woman ____I thought was my aunt.
【单选题】
All the apples _____ fell down were eaten by the pigs.
【单选题】
Would you like to ______us in our discussion.