A:该变异可能导致翻译过程提前终止
B:正常情况下A1和A2可存在于同一个配子中
C:利用光学显微镜可观测到A1的长度较A2短
D:该个体的子代中遗传信息不会发生改变
几乎全部是海洋的板块是( )
Tom: Hello! My name is Tom. What's your name?
Lily: My name is Lily.
Tom: Are you new?
Lily: Yes!
Tom: What class are you in?
Lily: I'm in Class 1, Grade 6.
Tom: Me too.
Lily: Can you show me our classroom?
Tom: OK! It's on the 3rd floor.
When National Day comes, we have a _____ holiday.