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A put option is a contract that gives its owner the right to sell an asset at a future date at a predetermined price.，更多细节参见体育直播
第二节 妨害公共安全的行为和处罚，详情可参考体育直播
This challenge is exponentially shorter than the first one! Submissions are due by March 16; you get two weeks. Either submit them as comments to the thread on Lobsters or as comments here.