[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fk1Vyh50P56lR8SoD5FeSmIs8Y0A9rGHjum9o5EGxJgw":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":10,"question":14,"related":15,"source":21,"type":22},[],"2025-10-20 16:11:04",1079612074,[8,9],"正确","错误",{"courseId":11,"workId":12,"workName":13},"1000120091","62827467","第六章单元测试","在面向对象编程中,"信号与槽"机制允许一个对象发出信号,而另一个对象可以通过槽接收信号.这种机制实现了对象之间的松耦合关系,意味着对象之间不需要直接引用,进而促进了程序逻辑与界面设计的分离.根据这一机制,我们可以得出结论:在使用"信号与槽"机制时,信号的发出者和接收者都必须存在直接的引用关系",[16,23,33,44,53,62,71,81],{"answer":17,"createTime":5,"id":18,"options":19,"question":20,"source":21,"type":22},[],1079612059,[8,9],"QApplication类是所有PyQt应用程序的基础,负责管理应用程序的控制流和主要设置.因此,在创建PyQt应用程序时,必须先实例化QApplication类","v2",3,{"answer":24,"createTime":5,"id":25,"options":26,"question":31,"source":21,"type":32},[],1079612062,[27,28,29,30],"用户输入","时间","事件","系统资源","事件驱动编程的核心特点是程序根据什么来执行任务",0,{"answer":34,"createTime":5,"id":35,"options":36,"question":42,"source":21,"type":43},[],1079612064,[37,38,39,40,41],"PyQt控件是构建GUI应用程序的基本构件","每个PyQt控件都可以通过信号和槽机制进行交互","PyQt控件只能在Windows操作系统上使用","PyQt控件提供了多种用户界面元素,如按钮、文本框等","PyQt控件是可重用的,可以在不同的GUI应用中使用","以下关于PyQt控件的描述中,哪些是正确的",1,{"answer":45,"createTime":5,"id":46,"options":47,"question":52,"source":21,"type":32},[],1079612066,[48,49,50,51],"setWindowTitle()","setGeometry()","show()","所以选项都正确","在PyQt中,QWidget类是所有窗口控件的基类.以下哪一项是QWidget类的常用方法",{"answer":54,"createTime":5,"id":55,"options":56,"question":61,"source":21,"type":32},[],1079612068,[57,58,59,60],"当按钮被点击时,槽函数 `onButtonClicked` 会立即被调用","信号和槽的连接需要在按钮被点击后手动调用槽函数","槽函数 `onButtonClicked` 只能在信号发出时被调用一次","信号和槽的连接是异步的,槽函数不会在信号发出时立即执行","在使用信号和槽机制时,假设有一个按钮对象 `button` 和一个槽函数 `onButtonClicked`.如果我们使用 `connect()` 方法将按钮的点击信号连接到槽函数,以下哪项描述是正确的",{"answer":63,"createTime":5,"id":64,"options":65,"question":70,"source":21,"type":32},[],1079612070,[66,67,68,69],"实现对象之间的直接通信","用于数据存储和管理","用于图形界面的布局设计","用于数据库的操作和管理","在PyQt中,信号与槽机制用于实现什么",{"answer":72,"createTime":5,"id":73,"options":74,"question":80,"source":21,"type":43},[],1079612072,[75,76,77,78,79],"信号可以携带参数,槽函数可以接收这些参数","信号和槽在同一线程中工作时,信号发射和槽调用是同步的","在多线程环境中,信号发射后槽的调用是异步的,不会等待槽函数执行完成","多个线程可以连接到同一个信号,并且可以同时接收该信号","信号与槽的连接只适用于单线程,不适用于多线程环境","在多线程环境中,信号与槽的机制是如何工作的?以下哪些选项是正确的",{"answer":82,"createTime":5,"id":6,"options":83,"question":14,"source":21,"type":22},[],[8,9]]