A:Do you like this story book?
B:I like reading.
C:There are many pictures in it.
比例尺中图上1厘米代表实地距离50千米,下列表达正确的是( )
看图, 填写单词。
____
右图为基因型AaBb的某动物正在分裂的细胞,下列叙述正确的是