题目

情景交际A: Hello! Li Ming! You look very unhappy. 【1】 ?B: I failed the math exam yesterday.A:【2】. But you don't need to worry about it all the time.B: I really don't know how to learn math well.【3】?A: Maybe you can join our math group, so that we can help each other.B: Sound great!【4】?A: Tomorrow, if you like it I'm sure you will be better and better. Now, don't be sad!B: Thank you so much.【5】.A: That's great!某同学利用性状分离比的模拟实验装置，进行如下实验，从甲、乙两个容器中各随机抽出一个小球，记录组合情况，重复多次实验后，结果发现AB、Ab、aB、ab的比值接近1：1：1：1．以下关于该实验的说法正确的是A．甲、乙两个容器分别代表某动物的雌、雄生殖器官B．小球的颜色和字母表示雌、雄配子的种类C．该实验模拟的是减数分裂过程中非同源染色体上基因的自由组合D．每个容器中两种的小球数量需相等，但甲乙两个容器中小球的总数可以不同