M: I hope the school library is open.W: The school library is open from eight a. m. to five p. m. weekdays, nine a.m. to three p.m. Saturdays, closed on Sundays. When is the library open on Saturdays（） A: It is closed. B: It is open from nine a.m. to three p. m. C: It is from nine a.m. to five p. m. D: It is open from eight a.m. to five p. m.

Python可以使用（____）函数打开文件，这个函数默认的打开模式为（____）。? open 'w'|open ;'r'|openfile 'r'|openfile 'w'

以读写方式打开文件正确的是（）。 A:  open（“log.txt”，”r”） B:  open（“log.txt”，”w”） C:  open（“log.txt”，”rb”） D:  open（“log.txt”，”w+”）

以下以追加模式打开文件做写入操作的是()。 A: open("a.tx","r") B: open("a.tx","w") C: open("a.tx","a") D: open("a.tx","w+")

在以下open语句中哪一项无法对文件test.txt进行内容删除或修改？? fp;=;open('test.txt',;'w')|fp;=;open('test.txt',;'r')|fp;=;open('test.txt',;'a')|fp;=;open('test.txt',;'r+')

以下文件操作方法,打开后能读取CSV格式文件的选项是:() A: fo = open("123.csv","a") B: fo = open("123.csv","w") C: fo = open("123.csv","x") D: fo = open("123.csv","r")

以下文件操作方法，打开后能读取 CSV 格式文件的选项是：‪‬‪‬‪‬‪‬‪‬‮‬‪‬‫‬‪‬‪‬‪‬‪‬‪‬‮‬‫‬‭‬‪‬‪‬‪‬‪‬‪‬‮‬‪‬‮‬‪‬‪‬‪‬‪‬‪‬‮‬‪‬‭‬‪‬‪‬‪‬‪‬‪‬‮‬‪‬‭‬‪‬‪‬‪‬‪‬‪‬‮‬‪‬‪‬ A: fo = open(123.csv,w) B: fo = open(123.csv,x) C: fo = open(123.csv,r) D: fo = open(123.csv,a)

下列语句打开文件的位置应该在（）。 f = open ( ‘itheima.txt’,’w’)

使用open打开文件时，mode参数的默认值是“w”。

M: I hope that the bank will be open.W: The sign says: nine a.m. to five p.m. weekdays, nine a. m. to twelve noon Saturdays, closed Sunday. When will the bank be open on Saturday() A: 12 noon to 9 p.m. B: 9a.m. to 5 p.m. C: 9a.m. to 12 noon.