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问题 选择题

下列说法中正确的是（     ）

A．淀粉水解与纤维素水解时所生成的最终产物相同

B．蔗糖是最重要的二糖，它的相对分子质量是葡萄糖的二倍

C．油脂、淀粉、纤维素都是天然高分子化合物

D．油脂可以与NaOH溶液发生皂化反应

答案

AD

题目分析：淀粉水解与纤维素水解时所生成的最终产物相同，都是葡萄糖，A正确；蔗糖水解生成1分子葡萄糖和1分子果糖，所以蔗糖的相对分子质量要小于葡萄糖的二倍，B不正确；油脂不是高分子化合物，C不正确；油脂是高级脂肪酸与甘油形成的酯类，所以油脂可以与NaOH溶液发生皂化反应，D正确，答案选AD。

点评：该题主要是考查学生对基本营养物质结构和性质的熟悉了解程度，意在巩固学生的基础，提高学生的应试能力和学习效率。本题难度不大，属于识记性知识的检验，记住即可。

单项选择题

男性，38岁，有反复咯血病史数周，血压正常，尿常规检查有血尿和蛋白尿，血常规呈贫血象，肾功能检查血肌酐560μmol／L，近日呼吸急促，血氧分压下降，肺部X线片见弥散性点灶浸润阴影，从肺门向外周散射。最可能的诊断是（）。

A.慢性肾炎慢性肾功能不全

B.急性链球菌感染后肾炎（重症）

C.急性肾小管坏死

D.急性间质性肾炎

E.肺出血一肾炎综合征
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问答题

Buyer and Seller entered into a sales contract to buy 10,000 kg chemical products at a price of RMB 200 yuan/kg, totalling RMB 2 million yuan. Among other things, the sales contract stipulated the following terms and conditions: within 10 days after the conclusion of the contract Buyer would make the advance payment of RMB 500,000 yuan and Seller was to deliver all the goods to the place of Buyer; the remaining price of RMB 1·5 million yuan should be paid within five days upon the delivery of goods; any breach of contract should be subject to the liquidated damages equivalent to 20% of the total price.Buyer made the advance payment, but Seller did not deliver any goods. Buyer urged Seller to deliver the goods immediately, as its production would be seriously affected by the short supply of the goods. However, Seller declared force majeure as the reason for non-delivery. Seller insisted that it was only a trading company, not a producer of the chemical products. Seller alleged that upon the conclusion of the contract, it entered into a purchase agreement with a producer to buy the goods from the latter. Due to a fire accident, the producer could not supply the goods under the purchase agreement; Seller therefore could not deliver the goods to Buyer. Non-delivery of goods was due to force majeure that caused the failure to supply the goods by the producer to Seller.Buyer refused to accept Seller’s argument and bought 10,000 kg of the same products for replacement at a price of RMB 220 yuan/kg, resulting in a total extra cost of RMB 200,000 yuan. Meanwhile it filed a lawsuit against Seller in the court, requesting liquidated damages of RMB 400,000 yuan (20% of the total price) and the damages of RMB 200,000 yuan for extra price caused for the urgent purchase.Required:Answer the following questions in accordance with the relevant provisions of the Contract Law, and give your reasons for your answer:

(b) state whether Buyer’s claims for liquidated damages and damages should be supported by the court. (5 marks)
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