【简答题】Match the underlined words with their meanings.
【判断题】两亿多年前,是恐龙家族最为昌盛的时期;大约在6500万年前,恐龙突然从地球上消失了。 ( )
【简答题】Please match the underlined words with the right interpretation.
【简答题】Match the underlined words with their meanings.
【单选题】题目 关于继电保护,不正确的说法是()
A.
当电力系统发生三相短路故障时,继电保护装置可快速切除故障
B.
对某些电压等级较低的不重要的电气设备,某些情况下可以不装设继电保护装置
C.
当电力系统发生如过负荷等异常时,继电保护装置可发出报警或跳闸
【简答题】Match the underlined words with their definitions.
【简答题】Match the underlined words with the correct form of the words in the box.