【单选题】【消耗次数：1】
I don’t think you’ll be able to understand this formula（公式）___ you finish school.
①
as if
②
only when
③
even
④
even when
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随机题目
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假设一种不支付红利股票目前的市价为10元，我们知道在3个月后，该股票价格要么是11元，要么是9元。假设现在的无风险年利率等于10%，该股票3个月期的欧式看涨期权协议价格为10.5元。则
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【多选题】
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④
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