【单选题】In international investment, the foreign country where the investor operates is called .
【简答题】设X和Y为两个随机变量,且【图片】,则【图片】_______________。(请用半角输入小数数字)
【单选题】设有定义: char *a[2]={"ABC","123"}; 则以下说法正确的是:
B.
a是指针变量,它指向含有两个数组元素的字符型一维数组
C.
a数组两个元素的值分别是"ABC"和"123"
【判断题】设X和Y为两个随机变量,它们的方差都存在,且均不为零,则它们的协方差Cov(X,Y)小于等于它们的标准差的乘积。
【单选题】Country of origin means the country ( ).
B.
where the goods are shipped
D.
where the goods are produced
【单选题】若有定义inti=123,j=12,k=1;语句 printi("%3d+%2d+%d",i,j,k);执行后的 输出结果是。( )