问题
单项选择题
直线相关分析中，下列描述错误的是（）
A.｜r｜=0表示完全相关
B.r的取值范围为-1≤r≤1
C.r的绝对值越接近1，表示两变量间相关关系密切程度越高
D.r没有单位
E.直线相关是描述具有直线关系的两变量的相互关系
答案
参考答案：A
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直线相关分析中，下列描述错误的是（）
A.｜r｜=0表示完全相关
B.r的取值范围为-1≤r≤1
C.r的绝对值越接近1，表示两变量间相关关系密切程度越高
D.r没有单位
E.直线相关是描述具有直线关系的两变量的相互关系
参考答案：A
When my mom came home from the hospital with twins, I was excited at the very beginning. I couldn’t __ to play with them and be the best big sister ever. Everyone was coming over to our house to hold the babies and _ _ presents to the babies and talk how ____ the babies were. Then they’d pull out their cameras, and just ____ I was about to say “cheese”, they’d run over to my perfect little brothers and take _____ of them. At that time I was thinking, “Why can’t I be little again so I can be the one getting all the _____?” When my aunt Camille got _____, my mom spent forever finding the perfect clothes for them. On the day of the _____, my twin brothers had the cutest and prettiest clothes. And then there was me, just sitting and watching in my _____ dress. After the ceremony, all I ____ was how sweet and lovely the twins were. I ____that they were wonderful, but I couldn’t help feeling ____. There was a big ____ after the wedding. Aunt Camille and her nice new ____ had the first dance, and then everyone started _____like crazy including me. I ____ my uncomfortable dress shoes, and I danced and danced and dances! It ____ one of the most fun times I’ve had in my whole life. The very __ __ part was when my aunt and I took my twin brothers by the hands and ____ them some dance moves. Teaching them was such a cool thing. I ____then what a huge waste of time feeling jealous is when you can kick off your shoes and enjoy life!
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