频数分布的两个重要特征是()
A.平均数越大和标准差越大
B.平均数越大和标准差越小
C.平均数越小和标准差越小
D.平均数越小和标准差越大
E.集中趋势和离散趋势
参考答案:E
The new stadium being built for the next Asian Games will be ______ the present one。
A.as three times big as
B.three times as big as
C.as big as three times
D.as big three times as
截至2010年,郑州商品交易所会员不到200家。()