简述无线传感器网络各层协议和平台的功能。

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.

ZDl05型牵引电机定子中单个换向极阻值为（）。

A、0．000558Q 

B、0．010558Q 

C、0．020558Q 

D、0．030558Q

指出重庆浓雾出现的主要季节，并分析该季节浓雾形成的主要原因。

当光栅损坏，其它设备均运行正常时，影响系统计重收费吗？

2010年前中国要实现“以申报纳税和优化服务为基础”（）的税收征管模式。

A.以计算机网络为依托

B.集中征收

C.重点稽查

D.强化管理