第10题: [单项选择]关于甲状腺髓样癌，下列论述错误的是（） A. 甲状腺髓样癌起源于甲状腺滤泡上皮 B. 髓样癌占甲状腺癌7% C. 甲状腺髓样癌的肿瘤标记物是降钙素 D. 手术原则同乳头状腺癌 E. 可兼有淋巴和血行转移 参考答案:A 答案解析:甲状腺髓样癌发生率7%，恶性度中等，预后较差，来源于滤泡旁降钙素分泌细胞（C细胞），属于神经内分泌肿瘤，可兼有颈淋巴结侵犯和血行转移。
第27题: [单项选择]Questions 23 to 25 are based on the conversation you have just heard. A. He and Elizabeth argued recently. B. He heard Elizabeth did poorly on the last test. C. He doesn’t want to bother Elizabeth so late in the evening. D. He’d rather study in his own dormitory. 参考答案:C 答案解析:[听力原文] Why doesn’t the man want to call Elizabeth
