单项选择题When was the Spring Festival listed as a three-day nationwide public holiday to celebrate cheerfully? A、Time under the leadership of Sun Yat-sen. B、In the Qing dynasty. C、On the first plenary session of the Chinese People's Political Consultative Conference. D、In the Ming dynasty.
单项选择题GB50325-2010推荐在苯测定时选用汽化室温度为150℃。