A: Open D:\data5.txt For Input As #1
B: Open "D:\data5.txt"For Input As #2
C: Open D:\data5.txt For Output As #1
D: Open "D:\data5.txt"For Output As #2
举一反三
- 为了读取数据，需要打开顺序文件“D:\data5.txt”，以下正确的命令是。 A: Open "E:\UserData.txt" For Input As B: 2 C: Open "E:\UserData.txt" For Output As D: 2 E: Open E:\UserData.txt For Output As F: 2 G: Open E:\UserData.txt For Input As H: 1
- 为了读取数据，需要打开顺序文件“D:data5.txt”，以下正确的命令是 。
- 如果从数据文件 c:\data.txt 中读取数据时,以下打开文件方式中,正确的是( ). A: Open c:\data.txt For Input As B: 1 C: Open c:\data.txt For Output As D: 1 E: Open "c:\data.txt" For Input As F: 1 G: Open "c:\data.txt" For Output As H: 1
- Suppose I have a data set called DATA and want to extract rows 1 to 10 and columns 5 to 7. What would be the relevant R command? A: DATA[1:10,5:7] B: DATA[5:7,1:10] C: DATA[10:1,7:5] D: DATA[7:5,10:1]
- 下列程序的功能是：将数据1,2,..,8写入顺序文件Num. txt中请补充完整。 Private Sub Form_Click ( ) Dim i As Integer Open "Num. txt" For Output As #1 For i = 1 To 8 【13】 Next Close #1 End Sub
内容
- 0
要从磁盘上读入一个文件名为"d:\File.txt"的顺序文件,下面程序段正确的是( ). A: Open d:\File.txt For Input As B: 1 C: Open "d:\File.txt" For Output As D: 2 E: Open "d:\File.txt" For Input As F: 2 G: Open "d:\File.txt" For Append As H: 1
- 1
用（ ）语句打开顺序文件File1.txt后，可以进行写操作 A: Open "File1.txt" For Input As B: 1 C: Open "File1.txt" For Output As D: 1 E: Open "File1.txt" For Random As F: 1 G: Open "File1.txt" For Binary As H: 1
- 2
要从磁盘上读入一个文件名为“c:\t1.txt” 的顺序文件，下列（ ）是正确的语句 A: F = "c:\t1.txt" , Open F For Input As #2 B: F ="c:\t1.txt" , Open "F" For Input As #2 C: Open c:\t1.txt For Input As #2 D: Open "c:\t1.txt" For Output As #2
- 3
已知文件'1'中有两行文本,第一行是'12',第二行是'34',然后fp=open('1'); fp.read(1); txt=fp.readline();此时变量txt的内容是 A: '1' B: '2' C: '2\n' D: '12\n'
- 4
下列哪一种是以顺序文件方式打开文件并进行写操作( ). A: Open "c:\file1.dat" For Output as B: 1 C: Open "c:\file1.dat" For Input as D: 1 E: Open "c:\file1.dat" For Print as F: 1 G: Open "c:\file1.dat" For Write as H: 1