已知文件'1'中有文字'a阿',则fp=open('1'); fp.read(1); fp.read(1); c=fp.read(1);此时变量c的内容是

A. 'a'
B. 'a阿'
C. ''
D. '阿'

已知文件'2'中有文字'abc',则fp=open('2','w+'); fp.write('123'); fp.close();此时文件'2'的内容是

A. 'abc123'
B. 'abc\n123'
C. '123'
D. 'abc'

已知文件'2'中有文字'abc',则fp=open('2','a'); fp.writelines(['123','456']); fp.close();此时文件'2'的内容是

A. 'abc\n123\n456\n'
B. '123\n456'
C. 'abc123456'
D. '123456'

已知文件'2'不存在,则fp=open('2','a+'); fp.writelines(['123\n']); fp.seek(0); txt=fp.readlines(); txt的值是

A. ['123']
B. ['123\n']
C. '123'
D. '123\n'

#读取文件内容file = open( 'dec/1.txt' )______ = file.read( )print(doc)______.close( )

#读、写文件内容fp=open('2.c', mode=______)txt=fp.read(10)fp.seek( 0 )______.write( 'new text' )fp.close()

#逐行读取文件内容with open( 'D:/3.py', ______ = 'utf8' ) as file:for row in ______:print(row, end='')

#一次性写入多个字符串text = ['12\n','34\n','56\n']with open( '../demo', 'w' ) ________:demo.______( text )

#追加文件内容text='''12345\nabcde\n+-*/%'''FP = open('try.tex', 'a')FP.write(______)FP.________( )

#读取文本行with open( '4.py', 'r+' ) as Fp:for ________ in Fp.________():print(line, end='')