The API recognizes that synchronous data sources are both necessary and common. The application should not be forced to always accept the performance cost of asynchronous scheduling simply because that's the only option provided. At the same time, mixing sync and async processing can be dangerous. Synchronous paths should always be an option and should always be explicit.
Other considerations
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（二）从海关取得的海关进口增值税专用缴款书上列明的增值税税额；
But a combined Paramount-Warner Bros would also leave it in control of a significant slice of sports and children's entertainment, raising potential concern for advertisers and local television distributors.