第8题: [单项选择]Mr. Black bought four birds because ______ . [A] they were different from the local ones [B] they were very beautiful [C] they could make Tony happy 参考答案:C 答案解析:由于the boy like the birds very much所以选[C]。
第12题: [单项选择]There is an unquestionable link between job losses and ______ services. A. descending. B. declining C. deteriorating D. depressing 参考答案:C 答案解析:[解析] 动词辨析题。deteriorate表示“变坏，变质，恶化”；descend表示“下降，下沉”；decline表示“减少，谢绝”；depress表示“使沮丧、消沉，萧条”；depressing
第28题: [多项选择]下列关于PFM金属基底冠的设计，说法错误的是 A. 金属基底部分应大于0．5mm的厚度以增加其强度 B. 金属基底表面形态就无锐角锐边，各轴面呈流线形 C. 若牙体缺损严重，应保证基底冠厚度均匀一致，而以瓷层加厚来恢复患牙外形 D. 以全冠形式覆盖患牙表面，能、提供足够固位 E. 为保证颈缘有足够强度而不致在烧结时变形，可在冠的舌邻面制备颈环 参考答案:A,C
