第8题: [单项选择]采用钴铬合金铸造的支架时,下述哪种包埋方法不正确 () A. 磷酸盐包埋料一次包埋法 B. 硅酸乙酯水解液涂挂法 C. 硅酸乙酯系包埋料一次包埋法 D. 石膏包埋料一次包埋料 E. 复合包埋料包埋法 参考答案:D 答案解析:中熔合金-石膏系包埋材料;高熔合金-磷酸盐包埋料、硅酸乙酯包埋料。钴铬合金属高熔合金。
第11题: [单项选择]Shelley's masterpiece, ______, is a verse drama, which borrows the basic story from the Greek mythology. A. The Revolt of Islam B. Prometheus unbound C. Ode to the West Wind D. Adonais 参考答案:B
第31题: [单项选择]Sometimes my job is boring, but ______ I enjoy it. A. by contrast B. by nature B. on the whole C. on the average 参考答案:C 答案解析:[解析] 考查知识点:词义辨析。by contrast与……相比,后面要跟with,by contrast with与……相比较;by nature本性,生性;on the whole总的来说;on