A表有3行,B表有2行,A表和B表全连接后得到的新表行数为5行()
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查看bookstore数据库中book表中图书类别为计算机的所有记录
The reports of terror attacks in Paris were__________ across newspapers and websites.
When you visit a new place, try to talk to ________ people and tastelocal food for a better understanding of the culture.
在编写xml文件设计布局时，用于设置控件背景的属性是（）。
A. centerVertical
B. background
C. src
D. padding
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