【单选题】【消耗次数：1】
根据合同法律制度的规定，下列情形中，要约没有发生过法律效力的是（ ）？
①
撤销要约的通知在受要约人发出承诺通知之前到达
②
同意要约的通知到达要约人
③
受要约人对要约的内容作出实质性变更
④
撤回要约的通知与要约同时到达受要约人
参考答案：
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相关题目
【单选题】
受要约人在承诺期限内发出承诺，按照通常情形能够及时到达要约人，但因其他原因承诺到达要约人时超过承诺期限，此时，承诺的效力如何：( )。
①
除要约人及时通知受要约人因承诺超过期限不接受该承诺的以外，该承诺有效
②
成为新要约
③
有效
④
无效
【判断题】
根据《中华人民共和国民法典》规定，受要约人超过承诺期限发出承诺，或者在承诺期限内发出承诺，按照通常情形不能及时到达要约人的，为新要约；但是，要约人及时通知受要约人该承诺有效的除外。
①
正确
②
错误
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