A vessel,which does not normally engage in towing operations,is towing a vessel in distress.She().
A. need not show the lights for a vessel engaged in towing,if it is impractical to do so
B. may show the lights for a vessel not under command
C. must show a yellow light above the stern light
D. must show the lights for a vessel towing
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新技术新业务安全评估坚持()的原则,兼顾发展与安全,坚持发展与管理并重。
A. 统筹兼顾
B. 科学规范
C. 审慎稳妥
D. 依法管理
E. 确保安全
中国移动的视频监控业务名称为()。
A. 千里眼
B. 天眼
C. 全球眼
D. 宽视界