Question: 美国是何时像越南宣战的
Answer: 1971; 1971; 1964-08-07; 08-07-1964; 07-08-1964; 1964 8月 07; 1964 august, 07; 07 08 1964; 07/08/1964; 1964 08 07; 1964-08-07; 07 8月 1964; 08 07 1964; 08/07/1964