问题
单项选择题 A1型题
样本相关系数r=0时，说明（）
A.两变量不存在任何关系
B.两变量不存在直线关系，但不排除存在某种曲线关系
C.两变量关系不能确定
D.两变量必然存在曲线关系
E.两变量存在相关关系的可能性很小
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
样本相关系数r=0时，说明（）
A.两变量不存在任何关系
B.两变量不存在直线关系，但不排除存在某种曲线关系
C.两变量关系不能确定
D.两变量必然存在曲线关系
E.两变量存在相关关系的可能性很小
参考答案：B
The True Story of Treasure Island It was always thought that Treasure Island was the product of Robert Louis Stevenson’s imagination. ___36___，recent research has found the true story of this exciting work. Stevenson, a Scotsman, had lived 37 for many years in 1881 he returned to Scotland for a 38 . With him were his American wife Fanny and his son 39 . Each morning Stevenson would take them out for a long 40 over the hills. They had been 41 this for several days before the weather suddenly took a turn for the worse, Kept indoors by the heavy rain. Lloyd felt the days 42 . To keep the boy happy Robert asked the boy to do some 43 . One morning, the boy came to Robert with a beautiful map of an island. Robert 44 that the boy had drawn a large cross in the middle of 45 . “What’s that?” he asked “That’s the 46 treasure “said the boy Robert suddenly 47 something of an adventure story in the boy’s 48 While the rain was pouring, Robert sat down by the fire to write a story. He would make the 49 a twelve-year-old boy just like Lloyd. But who would he the pirate（海盗）? Robert had a good friend named Henley, who walked around with the 50 of a wooden leg. Robert had always wanted to 51 such a man in a story 52 Long John Silver the pirate with a wooden leg, was 53 . So thanks to a 54 .September in Scotland a friend with a wooden leg and the imagination of a twelve-year-old boy we have one of the greatest 55 stories in the English language.
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