9130BSC的IP地址中,不随SSW的主备用变换而改变映射的地址有()
A.C1,C2,C6
B.A3,A4
C.B1,B2,B6
D.A1,A2
参考答案:A, C
--- Has Mary come back yet?
--- Yes. She has got many books from her elder schoolmates, and the number ___ 1000.
A.adds up
B.adds up to
C.add to
D.add up to
采煤机故障处理的一般步骤?