若函数$y=\left(3+m\right)x^{8-m^2}$是反比例函数，则m=____ 

人的受精卵、生殖细胞和成熟的红细胞中染色体的数目分别是（　　）

读如图两幅图，回答问题：

阅读理解

Ann：My hobby is reading．I can learn a lot from different kinds of books．But that's not the only reason why I like reading．The other reason is that there are many stories in books．I always lose myself in the wonderful world that books show me．So friends，why not join me in reading books?Let's have fun together．

Bob：I used to be a bit weak，but now I'm strong because of doing sports．I do sports every day，such as running，swimming and playing bail games．I keep exercising for at least two hours a day．Whenever I feel tired，I do sports．That can make me relaxed．Then I can study better．Doing

sports is really a great hobby．