spam='python 编程'print(spam[-1:0]报错。
spam='python 编程'print(spam[-1:0]报错。
以下程序执行的结果是：spam=['cat','bat','rat','elephant'] spam[1:4] A: ['bat', 'rat', 'elephant'] B: ['cat', 'bat', 'rat', 'elephant'] C: ['cat', 'bat', 'rat'] D: ['bat', 'rat']
以下程序执行的结果是：spam=['cat','bat','rat','elephant'] spam[1:4] A: ['bat', 'rat', 'elephant'] B: ['cat', 'bat', 'rat', 'elephant'] C: ['cat', 'bat', 'rat'] D: ['bat', 'rat']
【学习通上的练习题及作业约定:输出的字符串不需要加引号，比如spam='123' print(spam),填空输出的值为123而不是'123'】spam='python 编程'print(spam[7:12])输出的值是？
【学习通上的练习题及作业约定:输出的字符串不需要加引号，比如spam='123' print(spam),填空输出的值为123而不是'123'】spam='python 编程'print(spam[7:12])输出的值是？
以下程序执行后的结果是：spam=[1,2,3,4] spam.append(5) spam
以下程序执行后的结果是：spam=[1,2,3,4] spam.append(5) spam
What is spam? Spam is _____ email.
What is spam? Spam is _____ email.
执行以下代码的结果是：spam = 'hello' spam + 'world' print(spam)
执行以下代码的结果是：spam = 'hello' spam + 'world' print(spam)
有以下代码L = ('spam', 'Spam', 'SPAM!')下面那项是不正确的 A: L[2] 'SPAM!' 读取第三个元素 B: L[-2] 'Spam' 反向读取,读取倒数第二个元素 C: L[1:] ('Spam', 'SPAM!') 截取后2个元素 D: L[0:1] ('Spam', ') 截取中间的第2个元素
有以下代码L = ('spam', 'Spam', 'SPAM!')下面那项是不正确的 A: L[2] 'SPAM!' 读取第三个元素 B: L[-2] 'Spam' 反向读取,读取倒数第二个元素 C: L[1:] ('Spam', 'SPAM!') 截取后2个元素 D: L[0:1] ('Spam', ') 截取中间的第2个元素
A more effective approach to controlling spam ha been the development and use of spam blockers, also known as ________. A: spam B: spam filters C: antivirus D: e-mail system
A more effective approach to controlling spam ha been the development and use of spam blockers, also known as ________. A: spam B: spam filters C: antivirus D: e-mail system
What will be the output of the following Python code? [br][/br]['f', 't'][bool('spam')] A: t B: f C: No output D: Erro
What will be the output of the following Python code? [br][/br]['f', 't'][bool('spam')] A: t B: f C: No output D: Erro
spam
spam