什么是信用卡账单日、到期还款日、最低还款额、自动还款？

用词的正确形式填空。

1. I have been                  (collect) stamps for five years.

2. You shouldn't                  (argue) with your classmates.

3. When he was very young, he took great more                  (interest) in science.

4. It was raining when the plane                  (land) in London.

5.                 (predict) the future can be difficult.

6. Could you please                   (not fight) with your classmates?

7. The girl was                   (shop) when she saw a car accident.

8. Miss Gao said                   (polite) "How do you do".

9. My father made a living by                   (sell) toys when he was young.

10. It's bad manner to ask                   (person) questions.

在△ABC中，若（a+b+c）（b+c-a）=3bc，则A=（　　）

A．90°

B．60°

C．135°

D．150°

假定有以下函数过程：
Function Fun(S As String) As String
Dim s1 As String
For i=1 To len(S)
s1=Ucase(Mid(S，i，1))+s1
Next i
Fun=s1
End Function
则Str2=Fun("abcdefg")的输出结果为______。

在窗体上有两个文本框控件和一个命令按钮，名称分别为Text1、Text2和Command1，以下程序实现的功能是当单击Command1按钮时，将把Text2控件中的文本全部选中，并把焦点设置在该文本框中。程序运行时的界面如图20-4所示，以下两空应填( )。

Private Sub Command1_Click()Text2．SelStart=0Text2．________=Len(Text2．Text) Text2．_______ End Sub

A．SelLength SetFocus

B．SelText SetFocus

C．SelLength GetFocus

D．SelText GetFocus

气虚下陷之久泻、久痢，最宜用补中益气汤。