下列词语中划线的字，注音全都正确的一组是（   ）

设斜率为2的直线$l$过抛物线$y^2=ax\left(a\ne 0\right)$的焦点F,且和$y$轴交于点A,若△OAF(O为坐标原点)的面积为4,则抛物线方程为(    ).

下列有关遗传变异的四种说法，请你判断（   ）               
①中心法则是指遗传信息的转录和翻译的过程
②基因型为AaB的绵羊可能产生aY的精子
③高茎豌豆（Dd）产生的雌雄配子种类相同，比例接近1：1
④染色体中DNA的脱氧核苷酸序列改变一定会引起遗传性状的改变

    Christina is an American girl. She is a good student. Every morning she gets up at 6:00. She has her breakfast at home. Then she wears her uniform and goes to school. She studies hard every day. She eats in the dining room when she is in school. After school, she does her homework first, then she cleans the room and helps her mother with the dinner. Before she goes to bed, she usually reads some books. Then at 10:00 p. m. she goes to bed. She thinks she is happy every day. What do you think of her?