本题选项A 很有迷惑性，但只要稍微留意细节即可排除，因为其给出的是屠 呦呦与其他三位科学家分享诺贝尔医学奖，而录音中说的是有三位科学家获得此奖，其中包括屠呦呦。选项C 和 D 也可以排除，因为录音说屠呦呦发现了 artemisinin (青蒿素），而不是chloroquine (氯喹）或疟疾病菌抗体（这是解释青蒿素时带出 来的背景中涉及的内容）。B 是正确选项，400万瑞典克朗即录音原话中所说的800 万瑞典克朗的一半。

[重点难点]
把握数字转换，根据英语关键基本词的意义排除干扰。

[录音原文]
Three scientists from Ireland， Japan and China have won the Nobel Prize in Medicine for 2015. The 84-year-old pharmacologist, Tu Youyou from China, was awarded half of the prestigious 8 million Swedish kronor prize for her discovery of artemisinin， a drug that proved to be an improvem ent on chloroquine, an anti-malarial drug that had become far less effective as the malaria parasites developed resistance.