美国CAN-SPAM法案：
举一反三
- Which one of the following has been difficult to enforce due to the fact that over 50 percent of all spam originates from servers outside the United States? A: Spam blocking B: E-mail filtering C: Photo identity D: CAN-SPAM Act
- 美国CAN-SPAM法案： A: 滥发垃圾邮件是非法的。 B: 要求商业电子邮件发送者能够识别他们自己。 C: 大大减少了垃圾邮件。 D: 不推翻国家反垃圾邮件法。 E: 不禁止使用假返回地址。
- What is spam? Spam is _____ email.
- Which description about text classification in SMS spam control is wrong? A: Text classification relies on the patterns of SMS spam B: Machine learning is widely used in text classification C: Text classification uses phone numbers to filter SMS spam D: Text classification can be applied at a mobile cellular operator
- 执行以下代码的结果是：spam = 'hello' spam + 'world' print(spam)