（12分）（2012•山东）工业上由黄铜矿（主要成分CuFeS2）冶炼铜的主要流

设a是最小的自然数，b是最大的负整数的相反数，c是绝对值最小的有理数，则a+b+c的值为[ ]

A．2

B．1

C．0

D．﹣1

In October 2008 while Artai Construction Co Limited (Artai Co) was building a residence project, a serious accident took place because of geological causes. To rescue the project many construction materials, such as cement and sand, were needed. However, it was impossible for Artai Co to fi nd such a huge quantity of construction materials in a very short period of time. Artai Co, under such circumstances, had to negotiate with a developer of the neighbouring project and fi nally reached an agreement to buy construction materials from the developer at a very high price, three times the normal market price at that time. Artai Co fell into fi nancial diffi culty as a lot of funds had been spent on the rescue work and failed to pay the price for the construction materials as agreed. A dispute arose between Artai Co and the developer. Required: Answer the following questions in accordance with the relevant provisions of the Contract Law of China, and give your reasons for your answer:

(a) State the validity of the agreement between Artai Co and the developer with respect to the purchase of the construction materials, and who would decide the validity of the agreement; (4 marks)

患儿2岁。3天前饮食过度而致腹泻，大便有不消化的食物残渣，臭甚，呕吐物酸馊，舌苔黄垢，脉滑实。治疗应首选

A．消乳丸
B．保和丸
C．香连丸
D．六君子汤
E．藿香正气散

模型灌注后最佳的脱模时应控制在

A．10～20min

B．30～40min

C．50min

D．1～2h

E．2.5h

儒家主张“天人合一”，肯定人与自然界的统一。