A：可能是母本减Ⅱ出错，随此卵细胞一起产生的三个极体的基因型是AXb，AXb，a
B：可能是母本减Ⅰ出错，随此卵细胞一起产生的三个极体的基因型是AXb，AXb，a
C：该性染色体组成为XXY的白眼雄果蝇体细胞中含有3个染色体组
D：可能是父本减Ⅰ出错，XY染色体没有分离，产生异常精子XY和正常卵细胞结合
和谐是人类永恒的追求，隋唐时期的各种制度和政策，对于我们今天建设和谐社会和持久和平、共同繁荣的和谐世界，依然有着很多可供借鉴的地方。
My name is Tom Brown. I am an English boy. (1) I am twelve. I am a middle school student. From Monday to Friday I am very busy. We have six classes a day. At school, I like doing sports, (2) like playing basketball, tennis and soccer. So my favorite subject is P.E.. Mr. White is my P.E. teacher. He is very cool. After school, our P.E. teacher plays games with us. We students all like him. (3) I don't like math because it is too difficult for me. (4) But my math teacher Ms Smith says it is interesting and useful. So I must work hard on it.
下列地理事物组合不正确的是（ ）
下列有关Na2CO3和NaHCO3性质的比较中，正确的是（ ）
