题目内容
“May you have a good summer holiday．”（祝你有个快乐的暑假），在这段句子的所有英文字母中，字母a出现的频率是______．
“May you have a good summer holiday”中共有28个字母，
字母a出现了4次，
所以，字母a出现的频率=
=
．
故答案为：
．
字母a出现了4次，
所以，字母a出现的频率=
| 4 |
| 28 |
| 1 |
| 7 |
故答案为：
| 1 |
| 7 |
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