单项选择题

具有“L”型防反设计的接口是( )
A、SATA
B、DIMM
C、LGA 775
D、其余都是

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场效应管是利用外加电压产生的______来控制漏极电流的大小的。

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The men were held in the valley by a wall of fire. The figure of speech used in the above sentence is ( ). A. simile B. metaphor C. synecdoche D. personification