[单选题]若以a+方式打开一个已存在的文件,则以下叙述正确的是( )A、文件打开时,原有文件内容不被删除,位置指针移到文件末尾,可作添加和修改操作B、文件打开时,原有文件内容不被删除,位置指针移到文件开头,可作重写和读写操作C、文件打开时,原有文件内容被删除,只可作写操作D、以上叙述皆不正确
[单选题]货币市场存款帐户A、只包含于M1B、包含于M1和M2中C、包含于M2和M3中D、只包含于M3
[单选题]热轧钢筋按其机械性能分级,随级别增大,表示钢材( ).A、强度增大,伸长率降低B、强度降低,伸长率增大C、强度增大,伸长率增大
[单选题]关于包过滤防火墙的特点,下列说法错误的是______.A、安全性好B、实现容易C、代价较小D、无法有效区分同一IP地址的不同用户
[单选题]通过某卫生活动的实施,结核病的发病率明显下降,请问下降的发病率属于:A、成本B、成果C、效益D、效用
[单选题]关于金黄色葡萄球菌主要生物学性状叙述错误的是A、产生金黄色菌落色素B、甘露醇发酵实验和血浆凝固酶实验+C、无致病性D、产生α溶血素
[单选题]《混凝土结构设计规范》规定,位于同一连接区段内的受拉钢筋搭接接头面积百分率,对于柱类构件,不宜大于( ).A、25%B、50%C、75%D、100%.
[单选题]逻辑模型设计工作的完成阶段是A、系统分析阶段B、系统设计阶段C、系统实施阶段D、运行和维护阶段
[单选题]数据库系统的特点是____、数据独立、减少数据冗余、避免数据不一致和加强了数据保护.A、数据共享B、数据存储C、数据应用D、数据保密
[单选题]Word的页面设置中,默认的纸型为___.A、A4B、B5C、6KD、A3
[判断题]行政赋权行为,就是创制权利,赋予行政相对人一定的权利和利益.
[单选题]在C语言中,全局变量的隐含存储类别是A、staticB、externC、voidD、register
[单选题]Windows文件的目录结构形式属于___.A、关系型B、网络型C、线型D、树型
[单选题]修改E-mail帐户参数的方法是____A、在Internet帐户窗口中选择添加按钮B、在Internet帐户窗口中选择删除按钮C、在Internet帐户窗口中选择属性按钮D、以上途径均可
[单选题]属于网络层的互联设备是( ).A、中继器B、网桥C、交换机D、路由器
[单选题]按政策过程的阶段,可将政策监控分为( )、政策执行监控、政策评估监控和政策调整与政策终结监控.A、政策制定监控B、目标监控C、关键点监控D、内部监控
[单选题]How men first learnt to invent words is unknown; in other words the origin of language is a mystery． All we really know is that men unlike animals somehow invented certain sounds to express thoughts and feelings actions and things so that they could communicate with each other; and that later they agreed upon certain signs called letters． These letters could be combined to represent those sounds and which could be written down． Those sounds whether spoken or written in letters we call words． The power of words then lies in their associations---the things they bring up before our minds． Words become filled with meaning for us by experience and the longer we live the more certain words recall to us the glad and sad events of our past; and the more we read and learn the more the number of words that mean something to us increases． Great writers are those who not only have great thoughts but also express these thoughts in words which appeal powerfully to our minds and emotions． This charming and telling use of words is what we call literary style． Above all the real poet is a master of words． He can convey his meaning in words which sing like music and which by their position and association can move men to tears． We should therefore learn to choose our words carefully and use them accurately or they will make our speech silly and vulgar. Byassociationinthelastparagraph,theauthormeans______. A、aspecialquality B、ajoiningofideasinthemind C、anappearancewhichispuzzling D、astrangefeature
[单选题]介于广义与狭义文学之间而又难以归类的口头或书面语言作品,可以称为( )A、狭义文学B、折中义文学C、一般文学D、广义文学
[单选题]She is my child,and Iam for her. A、responsible B、primary C、loyal D、particular
[单选题]根据《物权法》规定,下列财产中不可以作为抵押权的客体的是:___A、在建房屋B、某大学的教学楼C、企业的生产设备、原材料D、法律、行政法规未禁止抵押的其他财产
[单选题]设一组初始记录关键字序列为(25,50,15,35,80,85,20,40,36,70),其中含有5个长度为2的有序子表,则用归并排序的方法对该记录关键字序列进行一趟归并后的结果为( ).A、15,25,35,50,20,40,80,85,36,70B、15,25,35,50,80,20,85,40,70,36C、15,25,35,50,80,85,20,36,40,70D、15,25,35,50,80,20,36,40,70,85