分子加上7,要使分数大小不变,分母应加上( )。

Hi, my name is Cathy. I'm short. I'm a student. I go to school by bike from Monday to Friday. Now, I want to introduce(介绍) my family to you.
|
This is my father. He is thirty-eight years old. He's a worker. He goes to work by bus. |
|
This is my mother. She is tall and thin. She's a doctor. She goes to work by car. |
|
This is my uncle. He is my father's brother. He has big black eyes and short hair. He is a farmer. He works on a farm. He goes to work on foot. |

⑴⑵⑶⑷⑸⑹⑺⑻

—No, it's ________ near.
—But it is too heavy.
和
之间只有一个真分数
。( )
m长的木材,要锯成每段
m长的若干段.如果锯每一次要用
分钟,锯完这根木材共要多少分钟?
长方体是特殊的正方体。