A.①②③ B.②③④ C.①③④ D.①②④
A.樹(shù)突→突觸→細(xì)胞體→軸突 B.軸突→細(xì)胞體→樹(shù)突→突觸 C.樹(shù)突→細(xì)胞體→軸突→突觸 D.樹(shù)突→突觸→軸突→細(xì)胞體
A.G的含量為30% B.U的含量為30% C.嘌呤含量為50% D.嘧啶含量為40%