作为财政政策工具，公债的特征有：
A 强制性
B灵活性
C固定性
D 自愿性
E 有偿性
When will the work be finished？英译汉
The taxi driver often reminds passengers to take their belongings when they leave the car.英译汉
Some of her pictures were shown in an art exhibition in Shanghai when she was 4 years old.英译汉
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