题目内容
变压器铁芯的结构一般分为（）和壳式两类。
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According to the historical records, ceramics were produced in Jingdezhen as far back as the ____ dynasty.
The porcelain in Jingdezhen is renowned “as white as____, as bright as____, as____as paper and as ____ as chime”.
Blue and white porcelain was born in ____ Dynasty.
Porcelain was born in the Neolithic period.( )
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