从材料角度区分，能判断儿童是否正在游戏的一个指标是（） 玩具的逼真程度。 有无许多玩具。 有无玩具或游戏材料。 玩具的贵贱。
You include the calendar class in your Hotel Booking application. Which additional form level objects will you need to create to implement this reusable component fully?（） Blocks 。 Visual attributes. 。 Stacked canvas. 。 Nothing further needs to be created.。
在JZZC-3型综合重合闸装置中，有N，M，Q，R各跳闸点，经N点跳闸的保护为（）。 距离，高频，接地不灵敏Ⅰ段保护。 距离，高频保护。 高频，接地不灵敏Ⅰ段保护。
原型化方法从用户界面的开发人员入手，首先形成（） 需求不确定性的用户界面。 用户界面需求分析说明书。 系统界面原型。 完善的用户界面。
The database administrator of your company created a public synonym called HR for the HUMAN_RESOURCES table of the GENERAL schema, because many users frequently use this table. As a user of the database, you created a table called HR in your schema. What happens when you execute this query?（） You obtain the results retrieved from the public synonym HR created by the database administrator.。 You obtain the results retrieved from the HR table that belongs to your schema.。 You get an error message because you cannot retrieve from a table that has the same name as a public synonym.。 You obtain the results retrieved from both the public synonym HR and the HR table that belongs to your schema, as a Cartesian product.。 You obtain the results retrieved from both the public synonym HR and the HR table that belongs to your schema, as a FULL JOIN.。
为防止瓶内介质因升温超压发生事故而设置的可拆卸的、由（）作为动作部件的熔化泄放型气瓶安全附件，简称易熔塞。
