This problem is in Contest(s) below:
Contest 1124:省编初中信息技术2020版.八年级上册.第一单元.第三课
Contest 1165:银湖实验807
Contest 1155:银湖实验808
Contest 1156:银湖实验806
Contest 1157:银湖实验803
Contest 1158:银湖实验拓1
Contest 1161:银湖实验810
Contest 1162:银湖实验805