【单选题】自2009年2月1日起,中版《航海通告》开始启用2000国家大地坐标系(CGCS2000),其他航海图书将在改版时陆续启用CGCS2000,在使用中版《航海通告》及航海图书时,CGCS2000坐标系可等同于下列哪个坐标系?
【单选题】Why is the student interested in learning more about dialects?
A.
She often has trouble understanding what other students are saying.
B.
She is trying to change the way she speaks.
C.
She is aware that her own dialect differs from those of her roommates.
D.
She spent her childhood in various places where different dialects are spoken.
【多选题】一元线性回归方程 y=a+bx ,其判定系数为 0.64 ,则 x 与 y 的相关系数可以是()
【单选题】What has MIT Professor Ariely discovered?
A.
People tend to behave irrationally in a predictable fashion.
B.
People should act according to logic and reason required in a situation.
C.
It causes problems to themselves as well as to others.
D.
He doesn't think this irrational behavior is always intentional.
E.
If a person knows someone suffers from a disease, he will feel he suffers from the same disease.
【多选题】反映某一元线性回归方程好坏的指标有( )。 A.相关系数 B.判定系数 C.b的大小 D.估计标准误 E.其他
A.
反映某一元线性回归方程y=a+bx好坏的指标有( )。 A.相关系数
【单选题】自2009年2月1日起,中版《航海通告》开始启用2000国家大地坐标系(CGCS2000),其他航海图书将在改版时陆读启用CGCS2000,在使用中版《航海通告》及航海图书时,CGCS2000坐标系可等同于下列哪个坐标系?