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问题 多项选择题

矿工在从事地下开采工作时，需要采用多种安全设施来抵御来自( )等地质灾害的威胁。

A．火

B．顶板

C．气体

D．地下水

E．粉尘

答案

参考答案：A,B,D,E

解析： 矿产资源开采属于危险性较大的作业，其中从事井工开采的矿山具有更大的危险性，矿山事故频繁发生。尤其是地下开采面临来自地下水、火、瓦斯、顶板和粉尘等地质灾害的威胁。

问答题

Ang is a director of Water UnLimited, a company specialising in water treatment. At a board of directors’ meeting, the directors were informed that the company’s research and development department had come up with a revolutionary water treatment method that was less costly than current methods. The lower cost of water treatment was expected to result in increased profits for the company, and a rise in its share price. As the new water treatment process was market sensitive information, it was not to be released to the public until the press conference scheduled in a week’s time.That night, Ang telephoned his father-in-law, Boo, and told him to buy Water Unlimited shares quickly as the price was expected to go up soon. Without asking any further questions, Boo purchased 50,000 Water UnLimited shares. When the new water treatment works was announced the following week, Water UnLimited’s share price rose sharply. Boo sold his shares at a substantial profit.Required:Discuss the liabilities of Ang and Boo under the Securities and Futures Act (Cap 289). (10 marks)
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单项选择题

语音信息在进行数字化时，使用的取样频率一般为 ( )

A．44.1 kHz

B．16kHz

C．4kHz

D．8kHz
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