2006年正式实施的《互联网电子邮件服务管理办法》主要从几个方面防范垃圾邮件
A. 采取Opt-in原则严格限定垃圾邮件的范围
B. 规范电子邮件及广告邮件的发送行为
C. 督促建立完整的法律体系
D. 建立电子邮件服务的行政许可制度
Section ADirections: In this section, you will hear three news reports. At the end of each news report, you will hear two or three questions. Both the news report and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A), B), C) and D). Then mark the corresponding letter on Answer Sheet 1 with a single line through the centre.[音频]Questions 1 and 2 will be based on the following news item.
A. 4
B. 13
C. 17
D. 18
Questions 1 and 2 will be based on the following news item.
A. Methane explosion in Turkey.
B. Miscounting of the people died in the accident.
C. Terrible working conditions of coal miners.
D. The worst mining disaster in history.
Questions 3 and 4 are based on the news report you have just heard.[音频]
A. 13 months old .
B. 13 days old .
C. 13 years old .
D. 30 months old .