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【判断题】
变压器在运行中，其总损耗是随负载的变化而变化的，其中铁耗是不变的，而铜耗是变化的。A.
正确
B.
错误
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【简答题】用来描述总体的数值特征的叫做_____________,描述样本的数值特征的叫做______________。
【简答题】A diabetic is visiting the doctor. Giving his family history, she says her 1. ▁▁ also had diabetes. She has taken 2. ▁▁ for diabetes for 6 years. Because of headaches and bone aches, she also takes3.▁...
【简答题】描述总体的特征数叫:参数，用希腊字母表示;描述样本的特征数叫:( )，用( )表示。
【单选题】She has (10) ... her own businessfor eight years.
A.
operated
B.
run
C.
controlled
D.
handled
【简答题】完形填空。（10分） I have a good friend. Her name is Kate. She is 1 American girl. She is eleven. She 2 with her family in China. There 3 four people in her family. They’re her father, her mother, her brother...
【简答题】Ⅲ完形填空。（10分） I have a good friend. Her name is Kate. She is American girl. She is eleven. She with her family in China. There are people in her family. They’re her father, her mother, her brother and h...
【简答题】A．The exams that she doesn't pass. B．The titles of the term papers she wrote. C．The reason why her family didn't travel anywhere 10 years ago. D．The places her family has traveled.
【简答题】描述总体的特征数叫( ),描述样本的特征数叫( )
【简答题】平面轮廓可将褶皱分为: 、 、 、 。
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