以下关于$User=M("User")(实例化User对象)说法不正确的是()。
A.M函数是TP内置的实例化方法,使用M函数不需要创建对应的模型类
B.M(‘Data’)实例化以后就可以直接对Data函数进行操作
C.M函数是一种直接在底层操作的Model类
D.M函数不具有基本的CURD操作方法
A.M函数是TP内置的实例化方法,使用M函数不需要创建对应的模型类
B.M(‘Data’)实例化以后就可以直接对Data函数进行操作
C.M函数是一种直接在底层操作的Model类
D.M函数不具有基本的CURD操作方法
A.SELECT*FROMpingshifen_homeworkStatisticsWHEREtype=1ANDstatus=1
B.SELECT*FROMpingshifen_homeworkStatisticsWHEREtype=1
C.SELECT*FROMpingshifen_homeworkStatisticsWHEREstatus=1
D.SELECT*FROMpingshifen_homeworkStatistics
A.if dic.get(user,'error')=='error': print('该学生不存在!') else: print(dic[user])
B.if user in dic: print(dic[user]) else: print('该学生不存在!')
C.if user not in dic: print('该学生不存在!') else: print(dic[user])
D.if dic.count(user)==0: print('该学生不存在!') else: print(dic[user])
A.该收件人标识为user
B.该邮件服务器在中国注册
C.该邮件服务器在美国注册
D.知道该用户的邮件地址 ,还需知道该用户的口令才能给他发邮件
E.当我们发信给他时,若此人不在网上,邮件将会丢失
A.user=="python" && password=="123456"
B.user=="python" and password=="123456"
C.user=="python" or password=="123456"
D.user=="python" || password=="123456"
A.DELETE USER 'user1'@'localhost';
B.DROP USER 'user1'.’ocalhost';
C.DROP USER user1.localhost;
D.DROP USER 'user1'@'localhost';
A.fopen("A:\user\abc.txt","r")
B.fopen("A:\\user\\abc.txt","r+")
C.fopen("A:\user\abc.txt","rb")
D.fopen("A:\\user\\abc.txt","w")
The major function of cookies technology is ______.
A.to prevent the information concerning the user from leaking
B.to find out details on the user's habits
C.to offer the user conveniences to access websites
D.to trace and record the user's activity online
A.alter user 'root'@'localhost' identified by ‘1111’;
B.alter user 'root'@'localhost' identified by 1111;
C.alter user 'root'@'localhost' =‘1111’;
D.set user 'root'@'localhost' =‘1111’;