当简单线性相关系数为0时，说明两个变量之间( )。A．没有任何关系 B．不存在直线 发布时间：2017-05-22 03:35 │ 来源：www.tikuol.com 题型：单项选择题 问题： 当简单线性相关系数为0时，说明两个变量之间( )。A．没有任何关系B．不存在直线相关关系C．不存在曲线相关关系D．具有不确定的关系
题型：单项选择题 完形填空。 Winter comes! In China winter lasts (持续) from about November to January of 1 . Someone says people don't like winter, because it's too cold outside. But many young people and children 2 it very much. It often snows 3 in winter. When 4 , most of the children 5 . They go out of their houses and play outside. The trees are white, the houses are white, and the land is 6 . The children make snowmen (雪人). 7 snowmen stand 8 . Many young people like to 9 in the white world (世界). I like winter, 10 ? ( )1. A. last year ( )2. A. don't like ( )3. A. in North China ( )4. A. it's raining ( )5. A. like to play at home C. would like to be at home ( )6. A. all white ( )7. A. Few ( )8. A. inside the houses C. on the trees ( )9. A. play ( )10. A. are you B. last month B. like B. in South China B. it's windy B. don't like to go out D. would not like to be at home B. clean B. Many B. outside the houses D. in the middle of streets B. swim B. do you C. the next year C. show C. in Shanghai C. it's snowing C. not all white C. Much C. sing C. and you D. the next month D. guess D. in HongKong D. it's cold D. not clean D. Little D. fish D. aren't you 查看答案
题型：单项选择题 食堂餐厨比为1:1，这是哪个规范规定的A．《食品企业通用卫生规范》B．《饮食业建筑设计规范》C．《公共场所卫生管理条例》D．《工业企业设计卫生标准》E．《公共场所卫生管理条理实施细则》 查看答案