The urethra passes through the of the penis A: tunica albuginea B: prepuce C: corpora spongiosum D: corpora cavernosa

The urethra passes through the of the penis. A: A. tunica albuginea B: B. prepuce C: C. corpora spongiosum D: D. corpora cavernosa

The key foundation and technology that the intelligent question answering system mainly depends on () A: A large amount of high-quality data and knowledge, mainly knowledge graph technology B: Powerful intelligent service engine C: Powerful natural language processing technology D: A large number of standard training corpora