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问题 选择题

在A＋B＝C＋D的化学反应中，20gA和10gB恰好完全反应生成5gC。若当D的式量为74.5，5gA和5gB发生反应时，生成D的质量是[ ]

A．2.62g

B．3.46g

C．4.27g

D．6.25g

答案

答案：D

问答题

Mr Jones was purchasing items to furnish his new house. He ordered all electrical and plumbing fi ttings from one supplier and these included an air-conditioning system. After being installed it transpired that the system could only provide cooling and no heating. Mr Jones is claiming that this is not what he ordered and that the supplier should replace the system provided and return the payment effected for the air conditioning system.Required:Explain what action, if any, can be taken against the supplier by Mr Jones. (10 marks)
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单项选择题

行政法有一般行政法和特别行政法之分，属于一般行政法的是（）

A、行政组织法

B、民政行政法

C、科技法

D、卫生行政法
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