专用发票
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增值税普通发票和专用发票的区别？
发票是指一切单位和个人在购销商品、提供或接受服务以及从事其他经营活动中，所开具和收取的业务凭证，是会计核算的原始依据，也是审计机关、税务机关执法检查的重要依据。收据才是收付款凭证，发票只能证明业务发生[详细]
2023-01-08 08:27 分类：问答How to set the activity indicator in the navigation bar?
I am new to iphone development. I want to set an activity indicator in the navigation bar. I see my activity indicator开发者_运维百科 below the navigation bar. My code is here[详细]
2022-12-20 18:45 分类：问答
![Interactive visualization of a graph in python [closed]](https://www.devze.com/res/2023/04-10/09/92d32fe8c0d22fb96bd6f6e8b7d1f457.gif)
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