下列四个相关系数中反映变量之间关系最密切的数值是()。
A.0.6
B.0.91
C.-0.8
D.-0.95
参考答案:D
Not once ________ to Michael that he could one day become a top student in his class.
A.occurred it
B.it did occur
C.it occurred
D.did it occur
少数引起局部组织的缺血性坏死,在眼造成巩膜炎属于()。
A.心包炎
B.类风湿结节
C.类风湿性血管炎
D.神经系统病变
E.肺间质病变和结节样改变