根据所给首,与出所缺单词。I can see a v ____ tape on the desk.Li Gang likes m ____ , but he doesn’t music.The p ____ is very good. I also want to buy one.This r____ is very big, but that one is very small.I n ____ a pen, two pencils and some books.
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4
3
1
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7
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5
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6
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____
二项式x+1nn∈N+的展开式中x2的系数为15,则n=( )
A. have a stomachache B. have a toothache
C. take some medicine D. take a good rest