[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fdejohuH73NzV3k8puCAtGw2xEsrXIBL4mfYYBV-YT0k":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":25,"type":30},[],"2025-10-20 16:11:04",1079612062,[8,9,10,11],"用户输入","时间","事件","系统资源",{"courseId":13,"workId":14,"workName":15},"1000120091","62827467","第六章单元测试","事件驱动编程的核心特点是程序根据什么来执行任务",[18,27,31,42,51,60,69,79],{"answer":19,"createTime":5,"id":20,"options":21,"question":24,"source":25,"type":26},[],1079612059,[22,23],"正确","错误","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":28,"createTime":5,"id":6,"options":29,"question":16,"source":25,"type":30},[],[8,9,10,11],0,{"answer":32,"createTime":5,"id":33,"options":34,"question":40,"source":25,"type":41},[],1079612064,[35,36,37,38,39],"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":43,"createTime":5,"id":44,"options":45,"question":50,"source":25,"type":30},[],1079612066,[46,47,48,49],"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":52,"createTime":5,"id":53,"options":54,"question":59,"source":25,"type":30},[],1079612068,[55,56,57,58],"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":61,"createTime":5,"id":62,"options":63,"question":68,"source":25,"type":30},[],1079612070,[64,65,66,67],"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":70,"createTime":5,"id":71,"options":72,"question":78,"source":25,"type":41},[],1079612072,[73,74,75,76,77],"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":80,"createTime":5,"id":81,"options":82,"question":83,"source":25,"type":26},[],1079612074,[22,23],"在面向对象编程中,&quot;信号与槽&quot;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&quot;信号与槽&quot;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"]