判断题
错误(↓↓↓ 点击‘点击查看答案’看答案解析 ↓↓↓)
二块温度分别为500K和300K的灰体平板,中间插入一块灰体遮热板,设板的发射率均为0.85,则最终遮热板的温...
单项选择题二块温度分别为500K和300K的灰体平板,中间插入一块灰体遮热板,设板的发射率均为0.85,则最终遮热板的温度为( )。 A、467K B、433K C、400K D、350K
Romance appeared in Middle England in the period from A...
单项选择题Romance appeared in Middle England in the period from Anglo-Saxon rule to Norman Feudalism, during which the Norman Conquest in 1066 marked the establishment of feudalism in England. ( ) A. 对 B. 错
《中国历代年谱总录》(增订本)的编撰者是杨殿珣。( )A.对 B.错
单项选择题《中国历代年谱总录》(增订本)的编撰者是杨殿珣。( )