题型:单项选择题 用is,are填空。1. There _______________ a small closet.2. There _______________ two end tables.3. There _______________ a trash bin.4. There _______________ some blue curtains.5. There _______________ a closet.6. There _______________ many books. 查看答案
题型:单项选择题 Financial derivatives contribute to market completeness by allowing traders to do all of the following EXCEPT :()A. increase market efficiency through the use of arbitrage. B. hedge positions in other assets and engage in high risk speculation. C. narrow the amount of trading opportunities to a more manageable range. 查看答案