（一）从销售方取得的增值税专用发票上列明的增值税税额；
* @param i 当前节点索引
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Web streams use a locking model to prevent multiple consumers from interleaving reads. When you call getReader(), the stream becomes locked. While locked, nothing else can read from the stream directly, pipe it, or even cancel it — only the code that is actually holding the reader can.
If the deal moves forward, it would put another of America's flagship news networks - CNN - under the control of the Ellison family, which has a friendly relationship with the White House.
conn = sqlite3.connect(DB)