【单选题】将二进制数1011110.1011001转换为十六进制为:
【单选题】听力原文:M: Hurry up, Linda. I hear that there aren't many tickets left for the football match. W: I'm ready now. Let's go. It's the early bird that catches the worm. Q: Why did the man ask the woman to h...
A.
He didn't want to warm up for the game.
B.
He didn't want to be held up in traffic.
C.
He wanted to make sure they got tickets.
D.
He wanted to catch as many game birds as possible.
【单选题】I'm much better now, _______? [ ]
【多选题】油箱根据使用情况通常可以分为( )两种。
【单选题】下列关于规范化理论的叙述中,哪一(些)条是不正确的?( ) I.规范化理论研究关系模式中各属性之间的依赖关系及其对关系模式性能的影响Ⅱ.规范化理论给我们提供判断关系模式优劣的理论标准Ⅲ.规范化理论对于关系数据库设计具有重要指导意义IV.规范化理论只能应用于数据库逻辑结构设计阶段V.在数据库设计中有时候会适当地降低规范化程度而追求高查询性能