被外国学者称为“中国17世纪的工艺百科全书”的《天工开物》的作者是（   ）

我国实施的第一个五年计划集中主要力量发展重工业，建立国家工业化和国防现代化的基础；相应地发展交通运输业、轻工业、农业和商业；相应地培养建设人才。

9的平方根是____ ，使分式$\frac{1}{x+1}$有意义的x的取值范围是____ ．

阅读理解, 判断正误。

Lily: Look! This is my family picture.

Mike: Who's this man?

Lily: He's my father.

Mike: Who's this woman?.

Lily: She is my mother. She's a teacher.

Mike: Is this your sister?

Lily: No, it's me! That girl is my sister.

Mike: Is this your brother?

Lily: Yes, he's a baby.

    Here is a picture. It is a picture of my  1  This is my 2. My quilt is on it. Two baseballs are under it. They are white 3. Look at my desk. A4is on it. I like computer games. A 5is on it, too. It's 9:00. My 6is in my schoolbag and two7are in it. My books are8the floor. My keys are in the desk.9is my ID card? Do you10? Oh, it's in my English book. I like my room. It's nice.