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简述计算机联锁设备巡、检修作业安全风险提示。

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消防水带接口有（）接口和（）接口两种。

A. 外螺纹固定；内螺纹固定
B. 内螺纹固定；内扣式
C. 外扣式；内螺纹固定
D. 内扣式；插入式

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To obtain accuracy in fixing by DF，（）and three stations should be used.

A. parallel bearings
B. long-range bearings
C. short-range bearings
D. cross bearing

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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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