【单选题】在数据库应用系统的需求分析阶段,需要考虑数据的安全性需求。下列不属于数据安全性需求分析内容的是
A.
分析数据的安全性需求,以确定每个关系表上定义的数据约束能够满足使用要求
B.
分析全局用户对数据的存取需求,以确定全局数据的安全控制策略
C.
分析特殊用户对数据的存取需求,以保证数据库的安全控制策略能够满足其使用要求
D.
分析各类用户对数据的存取需求,以确定各类用户能够操作的数据
【单选题】Restaurant servers should _____guests for coming to their restaurant and invite them to come back again at the end of their meals.
【单选题】Yesterday afternoon, they had a pleasant chat ______.
【单选题】某基准轴的公称尺寸为 150mm ,轴的公差为 0.025mm ,对该轴进行检测时采用内缩验收极限,且安全裕度为 0.0025mm ,则下验收极限为( )
【单选题】Mrs. White became a teacher in i985. She ______for twenty years by next summer.
D.
will have been teaching
【判断题】斑点金免疫层析试验方法学类型有双抗体夹心法、竞争法和间接法。
【判断题】西北朝向采光有限,应选择偏红、偏橙等暖色调的地毯。
【多选题】斑点金免疫层析试验方法学类型有 [填空(1)] [填空(2)] 和 [填空(3)] 。
【单选题】The 18th century was an age of poetry. A group of excellent poetry writers, such as Jonathan Swift, Samuel Richardson, Henry Fielding, were produced.