二次函数y=ax²+bx+c（a≠0）的图象如图所示，若ax²+bx+c=k（k≠0）有两个不相等的实数根，求k的取值范围(      )

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如图，已知∠1=120°，∠2=60°，∠4=125°，则∠3的度数为（   ）

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