The Iranian government is accused of ______ some terror organizations in the Middle East by the

United States, which can't not produce firm evidence to prove it. [ ]

A. appointing  

B. sponsoring    

C. consuming    

D. supplying

在直线回归分析中，如果算得回归系数b>0，可以认为β（）

A.大于0

B.小于0

C.等于0

D.不等于0

E.还需进一步检验确定