核心竞争力这一术语出现在()年
A.1989
B.1990
C.1991
D.1992
参考答案:B
Can you ______ me a few minutes? I am not clear about how to fill in the form. [ ]
A. spare
B. offer
C. share
D. save
若偏态分布资料一端或两端无确切的数值,描述其集中趋势指标是
A.几何均数B.四分位数间距C.中位数D.算术均数E.标准差