1、下列有关判断的依据不正确的是

A、氧化还原反应：是否有元素化合价的变化

B、苯的同系物：分子中只含有苯环和烃基

C、化学平衡状态：平衡体系中各组分的质量分数不再改变

D、离子化合物：是否含有离子键

第二节　 开放作文(15分)

请根据下面提示，写一篇短文。词数不少于50。

In your spoken English class, your teacher shows you the following picture. You are asked to describe the picture and explain how you understand it.

第一节 情景作文(20分)

假设你是光明中学的学生李华，得知国外某大学历史悠久。课程灵活，有意申请到该校英语系学习。请根据表格信息，用英语写一封自荐信。

注意：

1．词数不少于60。

2．信的开头和结尾已经给出。

提示词：英语演讲比赛English Speech Contest

Dear Sir,

My name is Li Hua, from Guang Ming High School in Beijing, China. I would like to apply for adrnission to the English Dept. of your school.

…

I should he grateful if you can take my application into consideration.

Looking forward to your early reply.

Yours sincerely,

Li Hua

35．The silence of the library is sometimes broken by a sudden cough or the sound of pages　 .

　　　 A．turning　　　　　　　 B．turned　　　　　　　　 C．being turned　　　 D．having turned