第4题: [单项选择]{{I}}Questions 28 to 30 are based on the passage you have just heard.{{/I}} A. The development of balloons. B. The weather balloons. C. The history of human being flying. D. Balloons for recreation. 参考答案:D 答案解析:[听力原文]28-30
Balloons have been used for sport for about 100 years.
There are two kinds of sp
第5题: [单项选择]关于安全生产领域有关协会组织发挥的作用,表述错误的是()。 A. 为生产经营单位提供安全生产方面的信息服务 B. 为生产经营单位提供安全生产方面的培训服务 C. 加强对生产经营单位的安全生产管理 D. 发挥自律作用 参考答案:C