第1题: [单项选择]The pain, which was due to the pressure of the cancer on a nerve, was entirely relieved by the shrinking of the growth, to the extent ______ it caused no further suffering. A. in which B. to which C. at which D. from which 参考答案:C 答案解析:该题中at which是介词加关系代词的组合,which指代先行词extent,因为extent表示程度的点,而在某个点上往往用介词at。
第25题: [单项选择]Levey-Jennings质控图以±3s为 A. 警告限 B. 失控限 C. 在控限 D. 误差限 E. 都不是 参考答案:B 答案解析:Levey-Jennilags质控图统计学含义:稳定条件下,在20个IQC结果中不应有多于1个结果超过2SD(95.5%可信限)限度;在1000个测定结果中超过3SD(99.7%可信限)的结果不多于3