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举一反三
【单选题】三相对称电路△型接法，则有（）
A.
U相=U线，I相=I线
B.
U线=1.732U相，I相=I线
C.
U线=1.732U相，I线=1.732I相
D.
U线=U相，I线=1.732I相
【单选题】Naturally the young are more inclined to novelty than their elders and it is in their speech, as it always was, that most of the vocabulary changes originate. But listening critically to their talk I ...
A.
lack linguistic originality
B.
have always been interested in magic
C.
are becoming more superstitious
D.
are interested in magic when young
【单选题】下列不属于直观想象的主要表现的是（ ）。
A.
建立形与数的联系
B.
利用几何图形描述问题，借助几何直观理解问题
C.
发现和提出问题，建立和求解模型
D.
运用空间想象认识事物