A:3
B:7
C:5
D:2
基因主要位于细胞核内的____ 上,____ 是____ 存在的,所以基因也是成对存在的。
Name
Jack
Age
14 years old
Hobbies爱好
play basketball with his classmates
Reason原因
interesting
breakfast
milk, bread and eggs
lunch
vegetables, chicken and rice
dinner
fruit, ice-cream and hamburgers