第1题: [单项选择]What is the main purpose of this message A. To inform a customer about a problem B. To report a shipping delay C. To confirm the contents of a delivery D. To advise a customer on a discount option 参考答案:A 答案解析:[听力原文] 80-82 Questions 80~82 refer to the following telephone message. 关于停止生产的预订货物及其后续相关措施的电
第2题: [单项选择]典型苯丙酮尿症的病因是 A. 肝细胞缺乏苯丙氨酸-4-羟化酶 B. 鸟苷三磷酸环化水合酶缺乏 C. 6-丙酮酰四氢蝶呤合成酶缺乏 D. 二氢生物蝶呤还原酶缺乏 E. 酪氨酸羟化酶缺乏 参考答案:A