单项选择题
A.125ns B.125μs C.125ms D.125s
A.0.85μm B.1.31μm C.1.55μm D.1.27μm
A.I-4.1 B.S-4.1 C.L-4.1 D.L-4.2
A.2M/64K B.622M/2M C.34M/2M D.155M/2M
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