10、UPPER函数（）A．将所有字母转换为小写字母B．将所有字母转换为大写字母C．将所有单词转换为首字母大写的格式D．将句首单词转换为首字母大写的格式
10、UPPER函数（）
A．将所有字母转换为小写字母
B．将所有字母转换为大写字母
C．将所有单词转换为首字母大写的格式
D．将句首单词转换为首字母大写的格式
参考答案和解析
错
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