题目内容

设随机变量X服从二项分布B(n，p)，则随机变量Y=n-X服从的分布为______．

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I ______ the cream from the milk. (skim, skin)

My mother never let me paint my ______. (nails, mail)

The next number is neither nine nor nineteen.

You will hear one word read from each group. Circle the correct one after listening and then read all the words correctly.

A. ton
B. tone
C. tongue