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单项选择题

变压器的铁心硅钢片()。

A.片厚则涡流损耗大,片薄则涡流损耗小
B.片厚则涡流损耗大,片薄则涡流损耗大
C.片厚则涡流损耗小,片薄则涡流损耗小
D.片厚则涡流损耗小,片薄则涡流损耗大