画示意图整理知识是学习历史的好方法之一。下图中的P处应该填写(    )

人类有双眼皮和单眼皮之分。控制双眼皮的基因是B，控制单眼皮的基因是b。下图是有关人类眼皮性状的遗传图解，请根据图解回答问题：

(1)该遗传图解中，父亲的性状表现是____ 。
(2)从图中基因组成看，母亲产生的卵细胞类型有____ 种。
(3)图解中③的基因组成是____ 。
(4)该夫妇生出一个单眼皮孩子的可能性是____ 。

极地地区气候寒冷，北极地区代表动物为（　　）

我国国民经济的基础产业是    (    )  

根据短文内容，选择正确答案。
A
    One day, Mr. and Mrs. White went shopping by car. They stopped their car near a store. They bought a lot of things and they wanted to put them in their car. But Mr. White couldn't open the door of the car. “Let's ask a policeman for help.” said Mrs. White. They asked a policeman to help them. The policeman was very friendly to help them open the door of the car. Just then a man came up and shouted, “What are you doing with my car?” Mr. and Mrs. White took a look at the number of the car. It was not their car.