题型:选择题 He told us that he was tired and thirsty because he ________ in the desert for days.A.walkedB.has walkedC.had walkedD.would walk 查看答案
题型:单项选择题 共用题干题 下颌左下76和右下156缺失,左下85和右下47弯制卡环,舌侧为塑料基托连接的义齿蜡型,采用混装法装入型盒,常规去蜡,充填,磨光。基托表面抛光处理时应保持湿润,其目的是()A.防止基托变形B.防止卡环变形C.防止人工牙外形磨损D.防止基托折断E.使塑料表面降温 查看答案