第3题: [单项选择]From the 1860s to the 1920s,the Republican Party dominated the political scene and from the 1930s to the 1970s()was in power most of the time. A. the Democratic Party B. the Republican Party C. no party D. None of the above. 参考答案:A
第20题: [单项选择]以上药物酸性最强的是 A. 苯巴比妥酸,pKa3.75(未解离率0.022%) B. 己锁巴比妥,pKa8.4(未解离率90%) C. 苯巴比妥,pKa7.4(未解离率50%) D. 异戊巴比妥,pKa7.9(未解离率75%) E. 戊巴比妥,pKa8.0(未解离率80%) 参考答案:A