第28题: [单项选择]What are they talking about A. The quality of steak. B. The falling price of beef. C. The rising price of beef. D. The price of beef. 参考答案:D 答案解析:W: I hope you’’ll all appreciate this steak. Recently we haven’’t had much steak because beef is qui
第29题: [单项选择]尿毒症患者发生纤维性骨炎的主要原因是()。 A. 尿钙排泄增多 B. 继发性甲状旁腺功能亢进 C. 尿磷排泄减少 D. 营养不良和低蛋白血症 E. 活性维生素D合成障碍 参考答案:B