Listening to a longer conversation and choose the best answer to each question you hear.

单项选择题The Anglo-American doctrine ofstare decisis (or binding precedent) has been incorporated into the WTO’s Dispute Settlement Understanding. A、正确 B、错误

单项选择题以下属于分类变量的是___________. A. IQ得分 B. 心率 C. 住院天数 D. 性别 E. 胸围