听下面一段材料, 回答第1至3题. 1. When did the man arrive? A. At 8:10. B. At 8:50. C. At 9:00. 2. How did the man come to the school? A. By bus. B. By bike. C. By car. 3. What season is it now? A. Spring. B. Autumn. C. Winter.
【简答题】查询学生(students)表中专业人数在2个及以上的专业名称和人数。 SELECT zhy AS 专业,( ) FROM students GROUP BY ( ) HAVING ( ); A. COUNT(*) AS 人数 B. COUNT(*)>=2 C. COUNT(zhy) AS 人数 D...