手工锯轨时将要锯的钢轨(),并在锯口的侧面及顶面划线。
A、清理环境
B、丈量长度
C、摆正
D、垫平
参考答案:B, C, D
—Is your name Brown?
—
A. Yes, it is. B. Yes, I am. C. No, I’m not.
阅读下面程序段,SelectItem应用程序显示从文本域的组合框中进行选择,请在程序中的画线处添上正确的语句使得程序能够正确运行。 … JTextField result=new JTextField(); JComboBox pick=new JComboBox(); public Selectltem() super("Select Item"); pick.addItemListener(this); pick.addItem("Navigtor"); pick.addItem("Internet Explorer"); pick.addItem("Opera"); pick.setEditable(false); result.setHorizontalAlignment(SwingConstants.CENTER); result.setEditable(false); pane.setLayout(new BorderLayout()); 【12】 pane.add(pick,"Center"): pane.add(result,"South"); setContentPane(pane); public void itemStateChanged(ItemEvent evt) Object source=evt.getSource(); if(source==pick) Object newPick=evt.getItem();result.setText(newPick.toString()+"is the selection."); repaint();