第8题: [填空题]When did she come home 参考答案:At six o’clock。 答案解析:[听力原文]
Q. When did she come home
细节题。短文中第三句告诉我们“At six o’clock she came home and got into the h
第17题: [单项选择]Animals that could not_________themselves to the changed environment perished and those that could survived. A. change B. adapt C. modify D. conform 参考答案:B 答案解析:本题译文:无法适应环境变化的动物会灭亡,而那些适应者则会幸存下来。change“改变,变化”;adapt“适应”,adapt oneself to“使某人自己适应于”;modify“更改,修改”;co
第22题: [单项选择]深龋备洞时,下列哪项措施是错误的?( ) A. 洞底平,侧壁平直,两者相垂直 B. 去尽腐质 C. 保护牙髓 D. 洞缘线圆钝 E. 尽量保留健康牙体组织 参考答案:A 答案解析:[解析] 深龋窝洞制备的基本原则是:去净龋坏组织,备洞时只需去除感染牙本质,不必将仅有脱矿而无细菌的脱矿层去除;保护牙髓组织;外形的范围根据龋坏的范围而定,应尽量保留健康的牙体组织,而且应保留紧邻病变