题目

某DNA分子中,若A占32.8%,当其复制两次后,其中的T占(    ) A.17.2%                   B.32.8%C.50%                      D.65.6% 答案:B It was ____ my teacher worked ____ I work hard.  A. where; that    B. where; where         C .that; that     D. that ;where
生物 试题推荐