第四十二条 增值税法第二十九条第一项所称经省级以上财政、税务主管部门批准可以由总机构汇总申报纳税，是指有固定生产经营场所的纳税人，总机构和分支机构不在同一省（自治区、直辖市）内的，经国务院财政、税务主管部门批准，可以由总机构汇总向总机构所在地的主管税务机关申报纳税；总机构和分支机构在同一省（自治区、直辖市）内但不在同一县（市、区、旗）内的，经省（自治区、直辖市）财政、税务主管部门批准，可以由总机构汇总向总机构所在地的主管税务机关申报纳税。
Developers using the streams API are expected to remember to use options like highWaterMark when creating their sources, transforms, and writable destinations but often they either forget or simply choose to ignore it.
，这一点在爱思助手下载最新版本中也有详细论述
2. 合并：将两个有序子数组合并成一个有序数组
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