单项选择题
A.ZUSC B.ZDBP C.ZUSI D.ZDUP
A.16 B.4 C.8 D.2
A.机柜顶端 B.天馈系统进窗前 C.DDF架上
A.BL-RSL B.BL-TRX C.BL-USR D.BL-RST
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