【单选题】《锅炉安全技术监察规程》施行的时间为()。
【单选题】Da Dong Restaurant was a ______ from the grand old lady of roasted duck restaurants, Quanjude, the over-two-century-old legend that won over even the emperors.
【单选题】固定患指中节,远侧指间关节屈曲功能障碍说明( )
【简答题】产品的累积故障分布可以是指数分布、威布尔分布等,但最简单的分布为( )。