有一非空文本文件textfile.txt，执行下述代码： file=open('textfile.txt','r') for line in file.readlines()         line+='[prefix]' file.close() for line in file.readlines():         print(line) 输出结果为：

file=open(‘textfile.txt’,’r’,encoding=’utf-8’)for line in file.readlines():line+=’[prefix]’file.close()for line in file.readlines():print(line)程序的输出结果是() A: 逐行输出文件内容 B: 逐行输出文件内容,但每行以[prefix]开头 C: 报错 D: 文件被清空,所以没有输出

有一非空文本文件textfile.txt,执行下述代码: file=open('textfile.txt,'r'); for line in file.readlines():; line+='[prefix]'; file.close(); for line in file.readlines):; print( line) 输出结果为() A: 报错 B: 逐行输出文件内容,但每行以[prefix]开头 C: 逐行输出文件内容 D: 文件被清空，所以没有输出

有一非空文本文件textfile.txt,执行下述代码()<br/>file=open(‘textfile.txt’,’r’,encoding=’utf-8’)<br/>for line in file.readlines():<br/>line+=’&#91;&#93;’<br/>file.close()<br/>for line in file.readlines():<br/>print()<br/>程序的输出结果是() A: 逐行输出文件内容 B: 逐行输出文件内容,但每行以[prefix]开头 C: 报错 D: 文件被清空,所以没有输出

___ shows Line 3; ___ shows Line 2; ____ shows Line 1.

Write the word ______. A: on line one B: on one line C: in one line

____<br/>is that we have to make a decision today. A: The bottom line B: The last line C: The first line D: The middle line

站位线 A: nacelle B: water line C: crown line D: station line

The voltage meter and current meter on the main switchboard shows ( <br/>). A: phase voltage and phase current of generator B: line voltage and line current of generator C: line voltage and line current of crane D: line voltage and line current of shore power

【单选题】排舞的英文表述为 。 A. Line dancing B. Line Dance C. Line dances D. Dancing in line