The speaker is mostly probably
A. a school librarian.
B. a museum director.
C. a tourist guide.
D. a famous historian.
Who has founded the activity of extreme ironing
A Canadian engineer.
B. Inga Kosak.
C. Shelagh Creagh.
D. Phil Shaw.
The fifth generation development program emphasizes
A. the infrastructure of the computing industry.
B. the logical progression of developments.
C. human-computer interaction and artificial intelligence.
D. the social need to cope with an increasingly complex worl
如果要选择分数在70~80之间的记录,正确的SQL表达式是______。
A. 分数>=70 AND<=80
B. 分数BETWEEN 70 AND 80
C. 分数>=70 OR分数<=80
D. 分数IN(70,80)