袭击发生后，FBI和美国邮政检查服务局成立了一个工作队来调查谁是幕后黑手。
After the attack, the FBI and the U.S. Postal Inspection Service set up a task force to investigate who had done it.
调用具有有效邮政编码的服务的测试，并检查是否返回了一组已知数据。
A test that invokes the service with a valid postcode and checks that a known set of data is returned.
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