Which letter is very useful to a deaf woman?哪个字母对一个盲人而言很重要?

Which letter is very useful to a deaf man?xx Which letter is very useful to a deaf woman? 1.which letter is very useful to a deaf woman? Which letter is very useful to a deaf woman? Which letter is missing? Which letter is a which letter is drink? which letter is for Which letter is ‘you’? which letter is inscert? Which letter is an insect? Which letter is an insect which letter is for drink? which letter is not me? Which letter is an insect? which letter is a question? Which letter is a question? Which letter is a vegetable