双眼皮是由显性基因E控制的，单眼皮是由隐性基因e控制的．一对夫妇父亲为单眼皮，母亲为双眼皮，第一个孩子是单眼皮，第二个孩子是双眼皮，第二个孩子的基因组成是（　　）

对于定义在R上的奇函数$f\left(x\right)$，满足$f\left(x+3\right)=f\left(x\right)$，则$f\left(1\right)+f\left(2\right)+f\left(3\right)=（ \; ）$

阅读下面短文，从短文后各题所给的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项。

    There was a small boy living on a farm which seemed so far away from everywhere. He was1 to get up before sunrise every morning to start his work and to go out again later to work in the evening.

    During sunrise he would take a 2and climb up on a fence, so in the distance he could see a house with golden3. He thought how4it would be to live there and began to5the modern equipment that might be6in the house. He thought, “If that is a house with golden windows, then there7be other nice things in the house.”8, he promised himself, “Some day I will go there and see this wonderful place9.”

    Then one morning his father told him to stay at home as his father would do the work. Knowing that was his10, he packed a sandwich and11across the field towards the house with golden windows.

    12 the afternoon going on, he began to realize how he had misjudged the distance.13, something else was wrong. As he came14to the house, he saw15golden windows but a place16by a broken fence which badly needed17. He went to the door and knocked. A small girl opened the door.

    He asked the girl if she had seen a house with golden windows. “18,” said the girl and invited him to sit on the porch (门廊). As he sat there, he looked19. There the20turned the windows of his home golden.