Start school later, sleep longer, learn better: New study shows that flexible school start times can be an effective and practical approach to reducing chronic sleep deprivation and improving adolescents’ mental health and academic performance.

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第十三条 纳税人按照一般计税方法计算缴纳增值税的,因销售折让、中止或者退回而退还给购买方的增值税税额,应当从当期的销项税额中扣减;因销售折让、中止或者退回而收回的增值税税额,应当从当期的进项税额中扣减。

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