单项选择题
A.800A B.1600A C.1400A D.2000A
A.<6kv B.<4kv C.<2.5kv D.<1.5kv
A.103K2 B.103K5 C.103K7 D.102Q2
A.KL4001 B.BC3150 C.KL9210 D.KL2408
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