题目内容
请简述新时代下，高等教育的意义。
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Listen to the audio clip and fill in the blanks:[音频]And finally in tonight's news, a nine-year-old boy named Joe told not to draw in class lands a job1a restaurant with his drawings. Rather than shutting down the habit of drawing in his school's workbook, Joe's parents decided to encourage his2 by sending their son to an after-school art class. His teacher recognized Joe's talent and 3all his work online, which led to something pretty wonderful. A restaurant named Number 4 in Newcastle contacted Joe's teachers to ask if the nine-year-old could come and decorated the dining room with his drawings. Every day after school, Joe's dad drives him to the restaurant, so he can put his ideas4 on the wall. Once he's all done, the work will remain there permanently. Joe's dad says, Joe is a really talented little boy. He's excellent at school. He's great at football, but drawing is definitely what he is most 5about.
根据正序等效定则，当系统发生三相短路故障，附加阻抗Z△为（）
单相短路因为零序电流等于零，所以复合序网中没有零序网络。
两相短路的短路点非故障相电压为正序电压的两倍。
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