推导圆面积公式时，将圆等分成若干份，拼成一个近似的长方形，这个长方形的长比宽多8

阅读理解。

     I have never taken cooking classes. I learned cooking from my mother because she was really interested

in teaching me how to cook. The main reason for this was that when my mother got married, she didn't know

how to cook anything, not even an egg. My grandmother never allowed her to stay in the kitchen when she

was cooking.

     My mother did not start to cook until she was 25 years old. In the beginning, it was very hard for her.

Therefore, she had to take cooking classes to prepare our meals. After having that experience, she decided

to teach me how to cook because she didn't want me to have the same experience.

      I remember when I was seven years old, and my mother was cooking, I was with her in the kitchen

enjoying cooking. I always helped her. Sometimes we prepared meals that my mother already knew how to

make, and sometimes we prepared them from recipes. Nowadays, I am really thankful for that experience

of people, it doesn't matter.

      I will do the same with my children because I don't want them to have the same experience as my mother.

If one day I am not with them, I want to be sure that they can carry on their lives without me.

1. The writer's mother learned cooking _______.

A. from the writer's grandmother

B. all by herself

C. by taking cooking class

2. The underlined word recipes in this passage most probably means _______.

A. instructions on how to cook food

B. experiences of cooking food

C. some well-known cooks

3. We can learn from the passage that the writer's children will _______.

A. hate cooking

B. learn cooking

C. teach cooking

4. The writer must think cooking is ______ to learn in life.

A. interesting

B. difficult

C. necessary

5. According to the passage, which of the following statements is TRUE?

A. the writer's mother didn't know how to cook anything but an egg.

B. the writer's mother started to cook after 25 years old.

C. the writer's mother taught the writer how to cook because she disliked cooking.

铁牛—55型和上海—50型拖拉机均采用（）制动器。

A、盘式

B、蹄式

C、带式

阅读下面这首唐诗，然后回答问题。（

　　【注释】①诗人应试不第，离开长安，乘舟返乡。②榜：船桨。

（1）试结合诗句分析诗人的情感变化。

________________________________________________________

（2）请分析“南枝鹊”这一意象在诗中的作用。

________________________________________________________

以太网交换机采用矩阵堆叠模式互连时，需要一个（）来连接所有的下层交换机。

A.菊花链堆叠总线

B.堆叠中心

C.菊花链中心

D.混合交换中心