已知两样本r1=r2,n1≠n2,则()
A.b1=b2
B.tb1=tb2
C.tr1=tr2
D.两样本决定系数相等
E.以上均不对
参考答案:D
先观察下面各算式,找出规律,然后填数.
37037×3=111111;
37037×6=222222;
37037×9=333333;
37037×______=444444;
37037×______=999999;
37037×______=888888.
The plane here for ten minutes already.
A.has arrived
B.has stopped
C.has come
D.has been