第3题: [单项选择]下列关于分光光度分析的叙述中,错误的是()。 A. 分光光度分析包括紫外光区,可见光区、红外光区三部分的光谱分析 B. 分光光度法的最大优点是可以在一个试样中同时测定两种或两种以上的组分而不需事先进行分离 C. 紫外线吸收主要研究的波长范围是紫外光区域,其波段范围是200~1100nm D. 分光光度法可以任意选择某种波长的单色光,可以利用各种组分吸光度的加和性,在指定条件下进行混合物中各自含量测定 参考答案:C
第16题: [单项选择]______ she wondered if she had made a mistake. A. Not until long afterwards that B. Not long until afterwards C. It was not until long afterwards that D. It was long afterwards until 参考答案:C 答案解析:强调句。本题综合考察了not…until…和强调句的用法。本句正常语序为She did not wonder if she had made a mistake until long afterwar