What is the speaker probably doing
A. Compiling a dictionary.
B. Writing a set of books.
C. Offering some great help.
D. Working for what they nee
在SQL中，由于对视图的修改最终要转换为对基本表的修改，因此下列只有哪种视图是可以修改的？（）
A. 行列子集视图
B. 带表达式视图
C. 分组视图
D. 连接视图
German technology conglomerate Siemens showed its new mobile phones
A. at a news conference.
B. at a mobile trade show.
C. at a mobile handset unit.
D. at a mass market.
What does the man mean
A. It would be best to drop both.
B. Steve's part-time jobs are the best for him.
C. Steve is really working too hard.
D. Steve's decision may be a good on
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