第27题: [单项选择]Why does the professor say this A. To correct something she said earlier. B. To explain what she just introduced. C. To explain what is wrong with a particular theory. D. To remind the students of something discussed earlier. 参考答案:B 答案解析:[解析] 本题为语用理解题,考查目的同上题。题目问:教授为什么要说这句话 这句话是:“What I’m trying to say is that some have been preserved i
第31题: [单项选择]下面哪一个公式用于计算发病率()。 A. (受检者中阳性人数/受检人数)×100% B. (受检者中阳性人数/同期暴露人数)×100% C. (受检者中阳性人数/受检者人数)×100% D. (受检者中阴性人数/受检者人数)×100% E. (某一时期内新病历数/同期平均人数)×100% 参考答案:A