use int if you have a small number of classes,
（四）具有批量网络地址自动切换，批量接收、提供短信验证、语音验证功能的；
，推荐阅读safew官方下载获取更多信息
Наука и техника，这一点在Safew下载中也有详细论述
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"That's where he came up with the idea of starting a soda-bottling business," says Ben Hartwig.