日积月累。

看到一篇文章被感动的热泪盈眶，下列与之相同的反射是（　　）

关于DNA复制的叙述，正确的是（　　）

①DNA规则的双螺旋结构为复制提供模板    ②DNA复制只发生于细胞周期的间期

③碱基互补配对是严格的                ④产生的两个子代DNA必定都和亲代DNA相同．

   Mr Smith 1from London. Now he is in China. He is 2 .He teaches 3 a middle school. He works very hard. His students like 4 very much. He can 5 a little Chinese . His students often teaches him Chinese 6 Sundays. Mr Smith likes playing football . He often plays football 7 his students.
   Mr Smith8  a son. His name is Jack. He is student. He studies in a middle school. He goes to school  9 bike everyday. He gets back home at four in the afternoon. He likes 10 TV in the evening.