第4题: [单项选择]Though the long-term ______ cannot be predicted, the project has been approved by the committee. A. affect B. effort C. effect D. afford 参考答案:C 答案解析:[分析] 本题考核形近词辨析。句意为:虽然不能预计该项目的长期影响,但委员会还是批准了它。选项中affect用做动词,意为“影响,感动”,如:Smoking affects health.吸烟影响健康
第18题: [单项选择]为了考虑安全性,每个教师只能存取自己讲授的课程的学生成绩,为此DBA应创建 A. 视图(view) B. 索引(index) C. 游标(cursor) D. 表(tabl 参考答案:A 答案解析:[解析] 视图对应数据库三级模式中的外模式,是一个虚表。视图能够简化用户的操作;而且能够对机密数据提供安全保护。这是因为有了视图机制,在设计数据库系统时,就可以对不同的用户定义不同的视图,使机密数据不
第20题: [单项选择]Questions 22-25 are based on a talk about salt.In the 16th century, what would happen if a man took more than his share of salt A. He would be hanged. B. He would be put in jail. C. He would get his ear cut off. D. He would be fined. 参考答案:C
第35题: [单项选择]男,55岁。进行性吞咽困难三个月,体重下降5kg,目前能进半流食。 进一步确诊的首选检查方式是 A. 胸部CT B. 食管超声波检查 C. 食管拉网 D. 食管镜检查活检 参考答案:D 答案解析:[解析] 男性中老年病人,有进行性咽下困难和消瘦。进行性咽下困难是中晚期食管癌的典型症状,并逐渐消瘦、脱水、乏力。此病人最可能的诊断是食管癌。首选的检查从备选项看,是纤维食管镜检查,可直接看到病灶,在