消防水泵接合器四周()范围内，应设有供消防车取水的消火栓或消防水池。
A. （A）20mm
B. （B）30m
C. （C）40m
D. （D）50m
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Your vessel is off a lee shore in heavy weather and laboring. Which action should you take?（）.
A. Put the sea and wind about two points on either how and reduce speed
B. Heave to in the trough of the sea
C. Put the sea and wind on either quarter and proceed at increased speed
D. Put the bow directly into the sea and proceed at full speed
根据《IEC 61850继电保护工程应用模型》规定，SV数据集成员应按（）配置。
A. DA
B. DO
C. LN
D. LD
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