通信工作必须树立质量第一的思想，坚持强度与性能并重的原则。
A person who sees someone fall overboard should（）. ["immediately jump into the water to assist the individual","call for help and keep the individual in sight","run to the radio room to send an emergency message","go to the bridge for the distress flare"]
浇筑重要工程的混凝土时，应注意些什么？
依据华电集团《安全生产事故（事件）综合应急预案》，企业发生突发事件时应当采用何种报告方式？
A person who sees someone fall overboard should（）. ["call for help and keep the individual in sight","run to the radio room to send an emergency message","immediately jump in the water to assist the individual","go to the bridge for the distress flare"]
在相对湿度较小，风速较大的环境下浇筑混凝土时有何要求？
