问题：
[单选题] 某医院住院部信息系统中有病人表R（住院号，姓名，性别，科室号，病房，家庭住址），“住院号”唯一标识表R中的每一个元组，“性别”的取值只能为M或F，“家庭住址”包括省、市、街道、邮编，要求科室号参照科室
A、PRIMARY KEYB、REFERENCES D（科室号）C、NOT NULLD、REFERENCES D（科室名）问题：
[单选题] Estimating schedule activity costs involves developing an approximation of the costs of theresources
A、project scope statementB、statement of workC、project management planD、project policy问题：
[单选题] The （ ）describes, in detail, the project’s deliverables and the work required to create those delive
A、project scope statementB、project requirementC、project charterD、product specification问题：
[单选题] CSMA, although more efficient than ALOHA or slotted ALOHA, still has one glaring inefficiency. If th
A、propagationB、transmissionC、collidingD、listening问题：
[单选题] CSMA,although more efficient than ALOHA or slotted ALOHA,still has one glaring inefficiency.If the m
A、propagationB、transmissionC、collidingD、listening问题：
[单选题] （ ） is the application of planned, systematic quality activities to ensure that the project will emp
A、Quality planningB、Quality control（QC、D、Quality costs问题：
[单选题] （ ）is the application of planned，systematic quality activities to ensure thatthe project will employ
A、Quality planningB、Quality control(QC、D、Quality costs问题：
[单选题] 以下关于RISC和CISC的叙述中，不正确的是 （ ） 。
A、RISC通常比CISC的指令系统更复杂B、RISC通常会比CISC配置更多的寄存器C、RISC编译器的子程序库通常要比CISC编译器的子程序库大得多D、RISC比CISC更加适合VLSI工艺的规整性要求问题：
