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【多选题】
人们在长期的实践活动中,发现变量之间的关系一般可分为( )。A.
函数关系
B.
回归关系
C.
交互关系
D.
相关关系
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反馈参考答案：
举一反三
【简答题】SS3B型机车的电气制动包括有电阻制动和( )。
【单选题】What did Beethoven, Gothe and Schiller have in common with Hitler?
A.
They were all evil people.
B.
They were all civilized people.
C.
They lived in the same time and had similar beliefs.
D.
They were all from Germany, a civilized society.
【单选题】—Were all the three people in thecar injured in the accident? —No, only the two passengers whogot hurt.
A.
it was
B.
there was
C.
there were
D.
there had
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