第 20 题 听力第二节 听力选择题 1.5 分 🎧 听力音频 What is the purpose of the scientists' experiment? A To keep the birds there for a whole year. B To help students study the birds well. C To prevent the birds from being killed. 查看答案与解析 答案 C 解析 此为听力题,解析略。 【详解】 此为听力题,解析略。 ← 第 19 题 整卷目录 第 21 题 →