协方差的大小会受到计量单位和数据均值水平的影响
参考答案:对
Please cut __ the banana __ small pieces.
A.up; to
B.up; into
C.off to
D.off into
—______ is this sweater?
—It's ______. [ ]
A. Who's, yours
B. Whose, mine
C. Who, hers
D. What, mine