问题
单项选择题
相关系数可以准确度量两个变量之间的关系强度，根据相关系数的相关知识，回答下列问题。
关于相关系数的性质，说法正确的是（）。
A.相关系数具有对称性
B.相关系数数值大小与变量的原点和尺度有关
C.相关系数可以描述非线性关系
D.相关系数意味着两个变量之间有因果关系
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
相关系数可以准确度量两个变量之间的关系强度，根据相关系数的相关知识，回答下列问题。
关于相关系数的性质，说法正确的是（）。
A.相关系数具有对称性
B.相关系数数值大小与变量的原点和尺度有关
C.相关系数可以描述非线性关系
D.相关系数意味着两个变量之间有因果关系
参考答案：A
| 完形填空。 | ||||
The Genesis(起源) of the Olympics The Olympic Games are an international sports competition, in which 1 play in many different types of games. Some athletes compete in the 2 Olympics. Some compete in the Summer Olympics. The Olympic Games are very old and have a very interesting history. The first Olympic Games were held in 3 in ancient times(古代). They probably began in the sixth century B.C. The contests were held every 4 years in the summer. The first games lasted for only one day. There was only one contest. It was a short 5 . Only Greek men were allowed to run in the race. 6 women were allowed, and no non-Greeks were allowed to run in the race. 7 were not allowed to watch the race, either, or to be anywhere near the racing area. 8 events were added later. One event added later was swimming. But the ancient games were stopped in 9 century A.D., 10 Greece was ruled by Rome. Now, how much do you know about the genesis(起源) of the Olympics? | ||||
|