在统计学中,当两个事物或现象在数量上的协同变异呈直线趋势时,这种现象称为()
A.正相关
B.负相关
C.直线相关
D.曲线相关
E.无相关
参考答案:C
While little Tony was climbing up a tree he fell off, his leg.
A.damaging
B.hitting
C.hurting
D.striking
以下是上行传输信道的是().
A、USCH
B、PCH
C、FACH
D、RACH