第24题: [单项选择]干眼病的病因是 A. 维生素A缺乏 B. 维生素B1缺乏 C. 维生素C缺乏 D. 维生素D缺乏 E. 维生素E缺乏 参考答案:A 答案解析:维生素A缺乏病目前仍是不发达国家中威胁人类健康,尤其是儿童的主要疾病之一。其临床表现除了皮肤黏膜改变 (如毛囊角化、角膜软化等)和影响视网膜上视紫红质更新引起夜盲。
第28题: [单项选择]Questions 11 to 18 are based on the conversation you have just heard. A. He’d rather not go to the lecture. B. He doesn’t mind if the woman goes to the lecture. C. He wants to hear the lecture. D. He’s heard the lecture before. 参考答案:C 答案解析:[听力原文] W: I can’t imagine you have any interest in attending that lecture on sculpture.For you it