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【判断题】
同一总体中时期指标数值的大小与时期长短有关,时点指标数值的大小与时点间隔长短没有直接关系。A.
正确
B.
错误
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【简答题】与未加反馈时相比,如反馈的结果使净输入信号变小,则为____,如反馈的结果使净输入信号变大,则为____;常用的反馈极性判断方法是____。
【简答题】与未加反馈时相比,如反馈的结果使净输入信号变小,则为____反馈,如反馈的结果使净输入信号变大,则为____反馈;常用的反馈极性判断方法是________。
【单选题】Many parents have abandoned their children______responsibilities to outsiders such as teachers and policemen.
A.
rearing
B.
training
C.
feeding
D.
cultivating
【单选题】Today, American colleges and universities are under strong attack from many quarters. Teachers, it is charged, are not doing a good job of teaching, and students are not doing a good job of learning. ...
A.
encourages efficient learning
B.
stimulates students to ask questions
C.
helps professors teach better
D.
discourages students attendance and preparation
【简答题】与未加反馈时相比，如反馈的结果使净输入信号变小，则为 [填空(1)] ，如反馈的结果使净输入信号变大，则为 [填空(2)] 。A. 负反馈B. 正反馈
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