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【多选题】
回归分析的内容包括A.
确定现象之间有无关系
B.
确定现象之间的相关程度
C.
确定现象之间的回归方程
D.
对因变量的理论值加以估计
E.
判断现象之间的相关形式
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】What does “promises” in Stopping by Woods on a Snowy Evening imply?
A.
an appointment with friends
B.
the unavoidable responsibilities
C.
the obligation to his family
D.
the heavy burden of life
【单选题】What does “promises” in the poem imply?
A.
an appointment with friends
B.
the unavoidable responsibilities
C.
the obligation to his family
D.
the heavy burden of life
【单选题】What does “promises” in “Stopping by Woods on a Snowy Evening” imply?
A.
the heavy burden of life
B.
the unavoidable responsibilities
C.
the obligation to his family
D.
an appointment with friends
【简答题】室内给水管道水力计算的目的是确定给水系统中的（）统所需压力。
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