设有说明intx=0,y=2;则执行if(x=0)y=1+x;elsey=x-1;后，变量y的值是（　　　）

答案查看网，轻松搜题/搜资源

【单选题】【消耗次数：1】

① -1

② 0

③ 1

④ 2

参考答案：

复制

纠错

相关题目

【单选题】已知x0，y0，且x＋y＝8，则(1＋x)(1＋y)的最大值为(　　)

① 25

② 16

③ 36

④ 9

查看完整题目与答案

【判断题】设随机变量X,Y相互独立，EX=0，EY=1，DX=1，则E[X(X+Y-2)]=0

① 正确

② 错误

查看完整题目与答案

【单选题】设X,Y独立同分布P(X=-1)=P(Y=-1)=1/2，P(X=1)=P(Y=1)=1/2则

① X=Y

② P(X=Y)=0

③ P(X=Y)=1/2

④ P(X=Y)=1

查看完整题目与答案

【判断题】若X~N(0,2)，Y~N(2,1)，X,Y独立，则X-Y~N(-2,1).

① 正确

② 错误

查看完整题目与答案

【判断题】设随机变量X,Y相互独立，EX=0，EY=1，DX=1，则E[X(X+Y-2)]=1

① 正确

② 错误

查看完整题目与答案

【单选题】若随机变量X,Y相互独立，EX=EY=0，DX=DY=1，则E(X+Y+1)2=

① 2

② 3

③ 1/3

④ 1

查看完整题目与答案

【单选题】执行下面程序后,运行结果是 #includevoid main( ) { int x=41,y=1; if (x%3==0 x%7==0) { y+=x;printf(y=%d\n} else {y=x;printf(y=%d} }

① y=41

② y=43

③ y=42

④ y=1

查看完整题目与答案

【单选题】以下程序段的运行结果是（）。 for(y=1;y) y=((x=3*y,x+1),x-1); printf(x=%d,y=%d,x,y);

① x=27,y=27

② x=12,y=13

③ x=15,y=14

④ x=y=27

查看完整题目与答案

【判断题】设 Ri 是 X 上的二元关系, 对于 x∈X 定义集合Ri(x)={y|xRiy}. 如果 X={-4, -3, -2, -1, 0, 1, 2, 3, 4}, 且令R2={|x, y∈Xùy-1y+2}，则R2(-1) ={ -2, -1}.

① 正确

② 错误

查看完整题目与答案

【简答题】设 Ri 是 X 上的二元关系, 对于 x∈X 定义集合Ri(x)={y|xRiy}. 如果 X={-4, -3, -2, -1, 0, 1, 2, 3, 4}, 且令R2={|x, y∈Xùy-1y+2}，则R2(-1) =[填空1]

查看完整题目与答案

随机题目

【单选题】 When we breathe, the oxygen in the air ____ with our blood and gives us life.

① fills

② goes

③ takes in

④ mixes

查看完整题目与答案

【单选题】 The disabled children need many things, but____, they need love.

① first of all

② above all

③ after all

④ all in all

查看完整题目与答案

【单选题】 Only by shouting at the top of his voice ____.

① he was able to make himself hear

② he was able to make himself heard

③ was he able to make himself heard

④ was he able to make himself hear

查看完整题目与答案

【单选题】 He won’t____ to bring me my umbrella unless I tell him again.

① forget

② remind

③ remember

④ realize

查看完整题目与答案

【单选题】 Many people prefer large cars, ___ large cars are safer than small ones.

① think

② to think

③ having thought

④ thinking

查看完整题目与答案

【单选题】 David watched her car until it ________ from view.

① remainded

② dalayed

③ grew

④ disappeared

查看完整题目与答案

【单选题】 When I got up this morning, I felt the temperature had ____.

① sunk

② reduced

③ dropped

④ lowed

查看完整题目与答案

【单选题】 The reason why the car was stopped was ____.

① that the road was slippery

② due to the slippery road

③ because the road was slippery

④ because of the slippery road

查看完整题目与答案

【单选题】 —WillyougoshoppingtogetherwithusthisSunday,Jenny?—Yes,____.

① I do

② I’d like to

③ I’d love to do

④ D. I’m busy

查看完整题目与答案

【判断题】域名解析是将主机名映射为IP地址的过程。

① 正确

② 错误

查看完整题目与答案