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问题 选择题

2010年上海世博会园区的自来水可以直接饮用，其奥秘是管道中使用了PVC膜，它的结构是一根根酷似面条的淡黄色空气塑料管，每一根“面条”的过滤孔径只有0.01微米，水分子可以通过，其他大分子被截流，从而达到净水的效果．PVC膜属于（　　）

A．金属材料

B．无机非金属材料

C．合成材料

D．复合材料

答案

从题干中可看出PVC膜“是一根根酷似面条的淡黄色空气塑料管”，属于塑料制品，塑料是三大合成材料之一．

故选C

问答题

Alexander has been the general director of -ZAO- JKL for three months. He has a fi xed term contract with the company that expires in 21 months time. On his appointment he was considered to have all the necessary skills to make the company more competitive. As Alexander owns 12% of the shares in the company, he was also regarded as a person who would be highly committed to the future of -ZAO- JKL.The internal auditor recently informed the board of directors of some disturbing facts. In the course of their duties they discovered that Alexander had records of ongoing discussions with key executives of -ZAO- PQR, the company’s main competitor. These records included notes that contained sensitive information on the sales performance and marketing plans of -ZAO- JKL, and it was quite clear that these had been discussed with the executives of the competitor.When the board of directors asked Alexander for an explanation of his actions, he replied that his actions were totally appropriate as it was common business practice to interact with other infl uential people in the industry and that there would be benefi ts for both companies.The board of directors was not satisfi ed with Alexander’s explanation and decided that they would need to consider Alexander’s future position in the company, as well as any action that might be taken to remedy any losses infl icted on the company by his actions.Required:

(a) Discuss the potential actions that may be instigated by -ZAO- JKL against Alexander. (6 marks)
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单项选择题

牵引变电所室内发生高压设备接地故障时，任何人员与接地点的距离不得小于（）米。

A、1

B、2

C、3

D、4
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