结构化分析和设计方法是在分析阶段建立系统的逻辑模型,而在设计阶段建立系统的【 】。
参考答案:物理模型
解析:在分析阶段建立系统的逻辑模型,在设计阶段建立物理模型。
关于明胶叙述错误的是()
A.明胶是一种吸卤剂
B.明胶不参与坚膜作用
C.明胶是一种保护性胶体
D.明胶膨胀后有多孔性
E.明胶最大缺点是不稳定
根据上下文提示,补全对话。
A: Excuse me, mom. (1) ______ my baseball glove?
B: Sorry, I don't (2) ______. Is (3) ______ on your desk?
A: No, it isn't.
B: Is it in your (4) ______?
A: No, it isn't in (5) ______ backpack.
B: Is it (6) ______ your bed?
A: (7) ______, it is. It's under my pillow. And where's my baseball?
B: Is it (8) ______ the desk?
B: Is it (9) ______ the chair?
A: Oh, yes. It's under the chair. (10) ______ mom.
B: You're welcome.