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问题 解答题
体育文化用品商店购进篮球和排球共20个，进价和售价如下表，全部销售完后共获利润260元.
 
 篮球
  排球
 进价（元/个）
   80
    50
 售价（元/个）
   95
60
（1）购进篮球和排球各多少个？
（2）销售6个排球的利润与销售几个篮球的利润相等？
答案

（1）篮球12个，排球8个；（2）4个

题目分析：（1）设购进篮球x个，排球y个，根据“篮球和排球共20个，全部销售完后共获利润260元”即可列方程组求解；

（2）先分别求得销售每个排球的利润与销售每个篮球的利润，从而可以求得结果.

（1）设购进篮球x个，排球y个，根据题意得

  

解得    

答：购进篮球12个，排球8个；    

（2）6×（60-50）÷（95-80）=4

答：销售6个排球的利润与销售4个篮球的利润相等.

点评：解题的关键是读懂题意及表中数据，找到等量关系，正确列方程组求解.

填空题

氮是地球上极为丰富的元素。

(1)Li3N晶体中氮以N3－存在，基态N3－的核外电子排布式为      。

(2)X＋中所有电子正好充满K、L、M三个电子层，它与N3－形成的晶体结构如图所示。X的元素符号是      ，与同一个N3－相连的X＋有      个。
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问答题

An auditing firm was entrusted by a listed stock company (Stock Company) to audit its accounts for the year ended 31 December 2006. During the process of auditing, the certified public accountants (CPAs) found the following information relevant to the business transactions for the year 2006:(a) On 1 April 2006, Stock Company concluded a contract with an instrument company. Under this contract Stock Company would be responsible for the management of the instrument company for three years. It would be compensated with 30% of the net profit of the instrument company for the management. By the end of 2006, Stock Company received a management fee of RMB 4 million yuan, which accounted for 10% of the net profit of Stock Company. (3 marks)(b) Stock Company was involved in a commercial dispute with a third party and the dispute was brought to the basic level court for trial. Stock Company had disclosed the information on the local newspaper when it received the judgement of the first instance. Both parties to the dispute disagreed with the judgement of the first instance and brought an appeal to the intermediate court. However, the court had not heard the appeal case by the end of 2006. (3 marks)(c) In September 2006, one of the shareholders who held 3% shares of Stock Company placed its shares as guarantee for a loan agreement. (4 marks)Required:For the Items (a), (b) and (c), discuss whether the above-mentioned information of Stock Company should be disclosed to the public in accordance with the relevant provisions of the Securities Law of China.Note: the mark allocation is shown against each of the three items above. (10 marks)
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