问题
单项选择题
We shall do everything possible to assist you in（）a mutually beneficial trade.
A.developing
B.developed
C.develop
D.development
答案
参考答案：A
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We shall do everything possible to assist you in（）a mutually beneficial trade.
A.developing
B.developed
C.develop
D.development
参考答案：A
A、B两个项目可能的收益率和发生的概率如下表所示：
| 经济形势 | 概率 | A项目收益率 | B项目收益率 |
| 差 | 0.1 | -3% | 2% |
| 稳定 | 0.3 | 3% | 4% |
| 适度增长 | 0.4 | 7% | 10% |
| 繁荣 | 0.2 | 10% | 20% |