以下说法中( )是正确的。A．首次沿途导游时，地陪应充分显示自己的基础知识、导游技

本题的功能是对下拉菜单项的操作，包括添加和删除。页面包括一个下拉菜单、一个文本框和两个按钮“删除”和“添加”，选中下拉菜单的一项后，可以通过“删除”按钮从下拉菜单中删除该项，在文本框中填入字符串后，单击“添加”按钮就可以将该项添加到下拉菜单中，所有信息都将显示在右侧的文本域中。
import java.awt.*;
import java.awt.event.*;
public class java2 extends java.applet.Applet implements ItemListener,ActionListener
Choice choice;
TextField text;
TextArea area;
Button add.del;
public void ink()
choice=new Choice();
text=new TextField(8);
area=new TextArea(6,15);
choice.add("音乐天地");
choice.add("武术天地");
choice.add("象棋乐园;);
choice.add("交友聊天");
add=new Button("添加");
del=new Button("删除");
add.addActionListener(this);
del.addActionListener(this);
choice.addItemListener(this);
add(choice);
add(del);add(text);add(add);add(area);

public void itemStateChanged(ItemEvent e)
String name=______;
int index=choice.getSelectedIndex();
area.setText("\n"+index+":"+name);

public void actionPerformed(ActionEvent e)
if(e.getSource()==add||e.getSource()==text)
String name=text.getText();
if(name.length()＞0)
choice.add(name);
choice.select(name);
area.append("\n添加"+name);


else if(e.getSource()==del)
choice.remove(______);
area.append("\n删除"+choice.getSelectedItem());

My mother is a teacher work in a key high school. She is too busy that she often has to get up early and stay up late. In addition to this, she hardly has any times to take exercise. She has been on poor health for some time. My father and I are worried that she may fall itl if she works too hard. These days I’m thinking why to develop my mother’s interest in playing sports. Considered that today is Mother’s Day, I decided buy a pair of jogging shoes for her. I secret put them on the desk in her study. When my mother entered into her study this evening, she looked surprised, but she immediately realized my intention. She promises that she would go jogging every evening.

配制一定摩尔浓度的NaOH溶液时，造成所配溶液浓度偏高的原因是（）。

A.所用NaOH固体已经潮解

B.向容量瓶倒水未至刻度线

C.有少量的NaOH溶液残留在烧杯中

D.用带游码的托盘天平称NAOH固体时误用“左码右物”

皮肤黏膜淋巴结综合征的辨证是（）

A.经络辨证

B.八纲辨证

C.脏腑辨证

D.三焦辨证

E.卫气营血辨证

企业保存的会计档案可以查阅，但是不得借出或者复制。( )