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【多选题】
电力变压器按绕组使用的材料划分,可以划分为A.
双绕组变压器
B.
铜绕组变压器
C.
自耦变压器
D.
铝绕组变压器
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】Research into new technologies provides a
A.
negative externality, and too few resources are devoted to research as a result.
B.
negative externality, and too many resources are devoted to research as a result.
C.
positive externality, and too few resources are devoted to research as a result.
D.
positive externality, and too many resources are devoted to research as a result.
【简答题】The new trend in artificial intelce research stems from
【单选题】The major contribution of this study is to ______.
A.
develop a new research technique easily transferred from one area to another
B.
make a comprehensive analysis of juvenile delinquency
C.
demonstrate the successful application of new research techniques in a new area
D.
modify creatively the previous research finding of juvenile delinquency
【简答题】The new economic research will not put an end to that dispute.
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