第2题: [单项选择]Questions 18-21 are based on the following passage.What did the writer’s friend do first after he entered the flat A. He took a shower. B. He heated some cold chicken. C. He played some records. D. He had a meal. 参考答案:D
第6题: [单项选择]Ⅱ型观测线() A. 近缺牙区的倒凹区小,非倒凹区大,而远缺牙区的倒凹区大,非倒凹区小 B. 近缺牙区的倒凹区大,非倒凹区小 C. 倒凹区与非倒凹区均大 D. 倒凹区均大,非倒凹区均小 E. 倒凹区均小,非倒凹区均大 参考答案:B 答案解析:Ⅰ型观测线:近缺牙区的倒凹区小,非倒凹区大;而远缺牙区的倒凹区大,非倒凹区小。Ⅱ型观测线:与Ⅰ型观测线相反,近缺牙区的倒凹区大,而非倒凹区小。Ⅲ型观测线:观测线在近缺牙区或远离缺牙区均离面近,离龈方远