第29题: [单项选择]维生素D缺乏症是() A. 眼干燥症 B. 坏血病 C. 癞皮病 D. 脚气病 E. 佝偻病 参考答案:E
第30题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. The class thought the demonstration was too complex. B. The professor didn’t show up, C. Too many students showed up. D. The professor cancelled it. 参考答案:D 答案解析:[听力原文]
W: Why didn’t you have your geology class today
M: Only three out of a class of twenty-fiv