My name is Sally Miller. I am a student in No. 3 Middle School. Look! This is a ruler. It's yellow. It's not my ruler. Who lost it?

    “Anna, is this your ruler?” I ask my friend.

    “No, it isn't. My ruler is white. And it's in my pencil box now,” Anna answers.

    “Excuse me, Jack. Is this your ruler?”

    “No, it isn't. My ruler is black.” Jack answers.

    “You can ask your cousin Jenny. She can't find her ruler.”

    “Hi, Jenny! Is this your ruler?” I ask.

    “Yes, it's mine. Thank you very much,” Jenny says. She is very happy to find her ruler.

①人们的文化生活更加丰富          ②文化产业已是我国的支柱产业

③文化创造的活力持续迸发          ④人民基本文化权益得到了保障

如图，A、B是反比例函数y=$\frac{2}{x}$（x＞0）图象上的两点，AC⊥y轴于点C，BD⊥y轴于点D，OB与AC相交于点E，记△AOE的面积为S₁，四边形BDCE的面积为S₂，则S₁、S₂的大小关系是（　　）

①叶绿体基质    ②类囊体薄膜    ③线粒体基质    ④线粒体内膜．

将豌豆一对相对性状纯合显性个体和纯合隐性个体间行种植，另将玉米(雌雄异花)一对相对性状纯合显性个体和纯合隐性个体间行种植。问隐性纯合一行植株上所产生的F₁是(　　)