题目脱氧胸腺嘧啶合成的直接前体是:()A. dUMPB. dUDPC. dCMPD. TMPE. TDP脱氧胸腺嘧啶合成的直接前体是:()A. dUMPB. dUDPC. dCMPD. TMPE. TDP题目解答答案D