发生接地故障时,特有的电气量是零序电压和零序电流。
参考答案:对
根据句意及所给汉语提示完成单词。
1. The old woman is crying _____ (悲伤). What happened to her?
2. I've _____(刚刚) known it. Sorry to hear that.
3. Kitty got _____ (结婚) last year. Her husband is a computer programmer.
4. The plane _____ (降落) at six this morning. Everything was OK.
5. How many _____ (街区) are there in your hometown?
肠套叠病人出现血性大便常()
A.见于2岁以内的小儿
B.见于年长儿
C.无腹痛体征
D.合并肠扭转
E.是少见的症状