第6题: [单项选择]不符合氢氧化钙性能的是 A. 对牙髓刺激性小 B. 有良好的隔垫性 C. 强碱性 D. 无抗菌作用 E. 溶于唾液 参考答案:D 答案解析:[解析] 氢氧化钙作用机理:强碱性,pH值为9~ 12,可中和炎症的酸性产物,利于消炎和减轻疼痛;有一定的抗菌作用;激活碱性磷酸酶而促进硬组织的形成,对牙髓的刺激性小并溶于唾液。故答案为D。
第13题: [单项选择]What does the woman mean A. She made the skirt herself. B. Her mother made the skirt for her. C. Her mother bought the skirt for her. 参考答案:B 答案解析:[听力原文] M: What a beautiful skirt. Did you make it yourself F: No. I had my mother do it. <