把当前目录下的filel. txt复制为file2. txt,正确的命令是 A: copy filel. txt file2. txt B: cp filel.txt I file C: cat file2. txt filel. txt D: cat file. txt > file2. txtt

下列命令中，拷贝库文件结构的命令是（）。 A: COPY STRUCTURE EXTENDED TO B: COPY FILE TO C: COPY STRUCTURE TO D: COPY TO

【单选题】在VFP中,对数据库文件分别用COPY命令和COPY FILE命令进行复制时,以下叙述中错误的是 A. 使用COPY命令时必须先打开表文件 B. 使用COPY FILE命令时表文件必须关闭 C. COPY FILE命令可以同时复制备注文件 D. COPY命令可以同时复制备注文件

若要将当前盘目录下的文件A.TXT连接在文件B.TXT后面，应使用的命令为( )。 A: COPY TXT＞＞TXT B: MOVE TXT＞＞TXT C: PATH TXT＞＞TXT D: TYPE TXT＞＞TXT

You want to ( ) maybe wake up a virus that has residented in memory. A: delete a file B: execute a program C: copy a file D: access a diskette

在Windows10中,以下文件名()是错误的. A: &file.txt B: file*.txt C: file.txt D: 文件.txt

以下代码，允许上传的文件类型有（ ）。<;input type="file" name="file" accept="text/*">; A: .css B: .shtml C: .txt D: .rtf

当用copy命令操作时，若指定的文件在指定驱动器中找不到，屏幕上会显示（） A: Disk boot failure B: File cannot copied onto itself C: File not found D: Bad command or file name

有以下程序:#include <;stdio. h>;main(){ FILE * f;f= fopen( " file a. txt"," w");Frintf( f, " abc");fclose ( f);}若文本文件file a.txt中原有内容为:hello,则运行以上程序后,文件filea. txt中的内容为______。 A: Helloabc B: abclo C: abc D: abchello

The file was marked "confidential" because A: it contained all the details of cost of manufacture, specifications and measurements. B: the design and material used for the products was very new and the contents of the file were secret. C: the rival firms sought to get it into their hands and copy it easily.