题目内容
After thinking a lot about Thanksgiving, the writer decided to write to his father, his grandmother, and the Rev. Lonual Nelson, his grammar school principle.
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When the writer read the replies from his father, the Rev. Nelson and his grandmother, he felt astonished because he hadn’t heard from them for several years.
The writer has learned from the writing of the three “thank you” letters that one should write to family members and teachers frequently.
判断char型变量ch是否为大写字母的正确表达式是。
满足字符变量ch是回车或者数字的C语言表达式是。
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