To break through the second part of biology in the senior high school entrance examination, we should practice the questions in the second part and break through the key answers.
Sorry, my friend, I can't help you if you want to find the answer. There is right or wrong in homework. To be perfect, you must have strong strength to create. I'm sorry it's hard to find the answer, but if you have any questions you don't understand, you can ask me and I'll try my best to answer them. Anyway, this is the purpose of learning, don't you think?