有些换热器开始时换热效果好,后来逐渐变差是何原因?
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逾期3年的应收款项符合坏账损失计提条件的可以作为坏账损失。
A. 正确
B. 错误
变压器油老化后产生酸性、胶质和沉淀物,会()变压器内金属表面和绝缘材料。
A. 破坏
B. 腐蚀
C. 强化
D. 加强
On a newly installed router, the following access list is added to the HSSI interface for incoming traffic:Access-list 101 permit tcp any 10.18.10.0 0.0.0.255 eq tcp What is the effect of the "any" keyword in the above access list?()
A. check any of the bits in the source address
B. permit any wildcard mask for the address
C. accept any source address
D. check any bit in the destination address
E. permit 255.255.255.255 0.0.0.0
F. accept any destinatio