1.
(2020高三上·浙江开学考)
统计不同单词个数:在Text1中输入一行单词,单词和单词之间用1个空格或标点符号隔开,单击“统计”按钮,在Text2中输出单词的个数,单词区分大小写,句子以符号结尾,程序运行界面如下图所示,部分程序代码如下:
k=0:s = Text1.Text For i = 0 To Len(s)-1
①
If ch >= "a" And ch <= "z" Or ch >= "A" And ch <= "Z" Then
word = word + ch
Else
For j = 1 To k
If ② Then Exit For
Next j
If ③ Then
k = k + 1
a(k) = word
End If
word = ""
End If
Next i
Text2.text=str(k)
则①②③处的代码为( )
A . ①ch = Mid(s, i, 1) ②a(i) = word ③ j <= k
B . ①ch = Mid(s, i, 1) ②a(j) = word ③ j <= k
C . ①ch = Mid(s, i+1, 1) ②a(i) = word ③ j > k
D . ①ch = Mid(s, i+1, 1) ②a(j) = word ③ j > k