【简答题】In the past, what did the students have to do if they want to copy?
【单选题】如果相关系数等于1,说明现象之间存在着()
【判断题】灵渠通过对长江的支流漓江和珠江的支流湘江的沟通,从而把长江和珠江两大水系联系起来。 1-
【单选题】如果相关系数的绝对值等于1,说明现象之间存在着( )
【单选题】If students want to obtain a Master's Degree after receiving the Bachelor degree, they usually need another _____ of full-time study.