On a _____ morning the little girl was found _____ at the corner of the street. A. freezing; freezing B. freezing; frozen C. frozen; frozen D. frozen; freezing 答案:B 解析: 略6.某DNA分子共有A个碱基,其中含胞嘧啶m个,则该DNA分子复制3次,需要游离的胸腺嘧啶脱氧核苷酸数为( )A.7(A-m)B.8(A-m)C.7($\frac{1}{2}$A-m)D.8(2A-m)