0.837×50=41.85,结果保留一位小数,正确的是[ ] A.41.8 B 发布时间:2017-04-30 08:34 │ 来源:www.tikuol.com 题型:选择题 问题: 0.837×50=41.85,结果保留一位小数,正确的是[ ]A.41.8 B.41.9 C.42.0
题型:选择题 Which of the following is NOT a correct statement concerning covariance()A. It can only apply to two variables at a time.B. A covariance of zero rules out any relationship.C. It can be negative. 查看答案