题目内容

金属材料由于化学成分不均匀，在电解液中发生（）腐蚀。

A. 化学
B. 宏观电化学
C. 微观电化学
D. 氧浓差

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Which two statements about the IS -IS routing protocol are true?（）

A. IS - IS is capable of supporting IPv4 and IPv6.
B. IS - IS is only capable of supporting IPv4 and CLN
C. IS - IS routers use ES - IS hellos (ESH) to establish and to maintain neighbor relationships.
D. IS - IS routers run the Bellman - Ford algorithm against their LSDBs to pick the best paths.
E. Level 1 routers learn about paths within the area of which they are a part.
F. Level 2 routers learn about paths both within areas and between areas.

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