科研之友
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<正>October 1st is China’s National Day.National Day,celebrating the foundation of the People’s Republic of China,is one of the seven legal holidays in China.In fact,National Day has appeared for a very long time and should go back to ancient times.It started in the Western Jin Dynasty(265—316)and originated from the celebrations of happy events in the country.In the feudal period,the emperor’s enthronement ceremony and the
