阅读下列短文,然后根据短文的內容從每小题的四个选项中选出可填入相应空白处的最佳选择,并把它前面的大写字母填入左边括号里。AGrandma Moses is among the most famous twentieth-century painters of the United States,yet she had only just begun painting in her late seventies.As she once said of herself:“I would never sit back in a rocking-chair,waiting for someone to help me.”She was born on a farm in New York State.At twelve she left home and was in a service until at twenty-seven,she married Thomas Moses,the tenant of hers.They farmed most of their lives.She had ten children,of whom five survived;her husband died in 1928.Grandma Moses painted a little as a child and made embroidery pictures as a hobby,but only changed to oils in old age because her hands had become too stiff to sew and she wanted to keep busy and pass the time.Her pictures were first sold at an exhibition,and were soon noticed by a businessman who bought everything she painteD.Three of the pictures were shown in the Museum of Modern Art,and in 1940 she had her first exhibition in New York.Between the 1930‘s and her death she produced some 2,000 pictures:careful and lively pictures of the country life she had known,with a wonderful sense of color and form.Grandma Moses began to paint because she wanted to_______.
已知英文大写字母D的ASCII码值是44H,那么英文大写字母F的ASCII码值为十进制数
A.46
B.68
C.70
D.15
在窗体上画一个名称为Text1的文本框,要求文本框只能接收大写字母的输入。以下能实现该操作的事件过程是
A.Private Sub Text1_KeyPress(KeyAscii As Integer) If KeyAscii < 65 Or KeyAscii > 90 Then MsgBox "请输入大写字母" KeyAscii = 0 End If End Sub
B.Private Sub Text1_KeyDown(KeyCode As Integer, Shift As Integer) If KeyCode < 65 Or KeyCode > 90 Then MsgBox "请输入大写字母" KeyCode = 0 End If End Sub
C.Private Sub Text1_MouseDown(Button As Integer,_ Shift As Integer, X As Single, Y As Single) If Asc(Text1.Text) < 65 Or Asc(Text1.Text) > 90 Then MsgBox "请输入大写字母" End If End Sub
D.Private Sub Text1_Change() If Asc(Text1.Text) > 64 And Asc(Text1.Text) < 91 Then MsgBox "请输入大写字母" End If End Sub