要合并两个顺序文件,则必须先以Output模式打开它们。To merge two sequential files, you must first open them in output mode.

要合并两个顺序文件,则必须先以Output模式打开它们。To merge two sequential files, you must first open them in output mode.

A.正确

B.错误

正确答案:错误

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