（）相当于文档中可能发生变化的数据或邮件合并文档中套用信函、标签中的占位符
A、域
B、数据源
C、目录
D、索引
参考答案：A
—We are ________our food. Will you go to the supermarket and buy some?
—No problem.[ ]
A. running out
B. running out of
C. giving out
D. getting rid of
以下选项中,值为1的表达式是【 】。
A．1-'0'
B．1-'＼0'
C．'1'-0
D．'＼0'-'0'
