若有以下程序段: int r=8; printf("%d\n",r>>1); 其输出结果是( )。
A.16 B.8C.4 D.2
参考答案:C
He did quite well in the maths exam and he is sure he'll________between 140 and 150.[ ]
A. grade
B. score
C. mark
D. win
有一儿童测得韦氏言语测验100分,操作测验118分。已知测验中言语测验信度和操作测验信度均为0.80。在95%的置信水平下,能否断定该儿童的言语智商明显低于操作智商 [提示:SEd=S×sqroot(2-rxx-ryy),sqroot(0.1)=0.316]