资本市场线揭示了有效组合的收益和风险之间的均衡关系。( )
参考答案:对
解析: 掌握资本市场线和证券市场线的定义、图形及其经济意义。见教材第七章第三节,P345。
OOO Trade is an importer and distributor of foodstuffs. It has entered into a contract of commission with Alexei through hich Alexei will sell 100 cases of caviar and 100 cases of wild mushrooms. Under the contract, OOO Trade has nsisted that cases of caviar will be sold for no less than 5.000 roubles per case and that cases of wild mushrooms will e sold for no less than 2.000 roubles per case. The parties to the contract also agreed on a commission fee of 25.000 oubles.Alexei soon found a buyer for the caviar who was prepared to pay 7.000 roubles per case. However, he has reater diffi culty in fi nding a buyer for the wild mushrooms and decided to sell them in the general market place for .500 roubles per case.Subsequently, the buyer of the caviar complained that the produce was of inferior quality and stated that he was onsidering legal action.Required:
(a) Explain the obligations of the parties to these transactions to one another in respect of the monies received for he caviar and mushrooms. (8 marks)
碳在生物群落与无机环境之间的循环形式主要是()
A.碳酸
B.碳酸盐
C.二氧化碳
D.碳水化合物