（　）is a computer technology that headsets ，sometimes in combination With physical spaces or multi—projected environments，to generate realistic images ，sounds and other sensations that simulate a user's physical presence in a virtual or imaginary environment.

对于逻辑表达式（（b1&b2）||in），需要（ ）个测试用例才能完成条件组合覆盖。

2023-09-01 从业资格其它

（ ）方法根据输出对输入的依赖关系设计测试用例。

2023-09-01 从业资格其它

（ ）analysis emphasizes the drawing of pictorial system models to document and validate both existing and/or proposed systems.Ultimately,the system models become the（ ）for designing and constructing an improved system.（ ）is such a technique.The emphasis in this technique is process-centered.Systems analysts draw a series of process models called（请作答此空）、（ ）is another such technique that integrates data and process concerns into constructs called objects.

2023-09-01 从业资格其它

（ ）analysis emphasizes the drawing of pictorial system models to document and validate both existing and/or proposed systems.Ultimately,the system models become the（请作答此空）for designing and constructing an improved system.（ ）is such a technique.The emphasis in this technique is process-centered.Systems analysts draw a series of process models called（ ）、（ ）is another such technique that integrates data and process concerns into constructs called objects.

2023-09-01 从业资格其它

（ ）analysis emphasizes the drawing of pictorial system models to document and validate both existing and/or proposed systems.Ultimately,the system models become the（ ）for designing and constructing an improved system.（ ）is such a technique.The emphasis in this technique is process-centered.Systems analysts draw a series of process models called（ ）、（请作答此空）is another such technique that integrates data and process concerns into constructs called objects.

2023-09-01 从业资格其它

软件的易用性包括（ ）。①易理解性②易学习性③易操作性④吸引性⑤依从性

2023-09-01 从业资格其它

假定学生Students和教师Teachers关系模式如下所示：Students（学号,姓名,性别,类别,身份证号）Teachers（教师号,姓名,性别,身份证号,工资）a．查询在读研究生教师的平均工资、最高与最低工资之间差值的SQL语句如下：SELECT（ ）FROM Students,TeachersWHERE（请作答此空）；b．查询既是研究生，又是女性，且工资大于等于3500元的教师的身份证号和姓名的SQL语句如下：（SELECT身份证号,姓名FROM StudentsWHERE（ ））（ ）（SELECT身份证号,姓名FROM TeachersWHERE（ ））;

2023-09-01 从业资格其它

假定学生Students和教师Teachers关系模式如下所示：Students（学号,姓名,性别,类别,身份证号）Teachers（教师号,姓名,性别,身份证号,工资）a．查询在读研究生教师的平均工资、最高与最低工资之间差值的SQL语句如下：SELECT（ ）FROM Students,TeachersWHERE（ ）；b．查询既是研究生，又是女性，且工资大于等于3500元的教师的身份证号和姓名的SQL语句如下：（SELECT身份证号,姓名FROM StudentsWHERE（ ））（请作答此空）（SELECT身份证号,姓名FROM TeachersWHERE（ ））;

2023-09-01 从业资格其它

给定关系模式SP_P（供应商号，项目号，零件号，数量），查询至少给3个（包含3个）不同项目供应了零件的供应商，要求输出供应商号和供应零件数量的总和，并按供应商号降序排列。SELECT供应商号，SUM（数量）FROMSP_P（请作答此空）（ ）（ ）。

2023-09-01 从业资格其它

假定学生Students和教师Teachers关系模式如下所示：Students（学号,姓名,性别,类别,身份证号）Teachers（教师号,姓名,性别,身份证号,工资）a．查询在读研究生教师的平均工资、最高与最低工资之间差值的SQL语句如下：SELECT（请作答此空）FROM Students,TeachersWHERE（ ）；b．查询既是研究生，又是女性，且工资大于等于3500元的教师的身份证号和姓名的SQL语句如下：（SELECT身份证号,姓名FROM StudentsWHERE（ ））（ ）（SELECT身份证号,姓名FROM TeachersWHERE（ ））;

2023-09-01 从业资格其它