单项选择题

insert overwrite命令将数据写入表中（） A. 对 B. 错

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单项选择题

Which of the following description of alternative tourism is NOT correct?
A、Alternative tourism is synonymous with replace tourism
B、Mass tourism is the opposite to alternative tourism
C、Alternative tourism is alternative to large scale tourism
D、Alternative may have a small-scale impact on a destination compared with mass tourism

单项选择题

河间地块潜水分水岭处，位置深处的测压点的地下水位高于位置浅处的水位，河流附近则相反。
A、正确
B、错误