肥厚性心肌病（梗阻型），能增强其收缩期喷射性杂音的因素是（） A.吸入亚硝酸异戊酯或

When I was about 12 , I had an enemy , a girl who liked to pointed out shortcomings (缺点).Sometimes she said I was thin , Sometimes she said I was lazy. Sometimes she said I wasn’t a good student. Sometimes she said I talked too much, and so on. I tried to put up with(忍受) her as long as I could . At last , I became very angry. I ran to my father with tears in my eyes.

He listened to me quietly, and then he asked, “ Are the things she said true or not ? Mary , didn’t you ever wonder what you’re really like? Go and make a list of everything she said and mark the points that are true. Pay no attention to the other things she said.”

I did as he told me and to my surprise, I discovered that about half the things were true.

I brought the list back to my father. He refused to take it. “ That’s just for you,” he said. You know better than anyone else the truth about yourself. When something said about you is true, you’ll find if will be helpful to you. Don’t shut your ears. Listen to them all , but hear the truth and do what you think is right.

Many years have passed. The situation often appears in my mind. In our lives we often meet with some trouble and we often go to someone and ask for advice. For some advice you will treasure(珍惜) all your life!

根据短文内容，判断以下句子的正误。你认为正确的句子请在题前括号内写“T，错误的写“F”。(共5小题，每小题2分，满分10分)

小题1:The writer had a real enemy when she was 12.

小题2:The writer asked her mother for advice.

小题3:The writer’s father told her to write down all her “enemy” had said about her.

小题4:The writer didn’t do what her father told her to do.

小题5:The writer is thankful to her father and her “enemy”.

一本书的页码是180，用天平测量其质量是270 g，则每张纸的质量是____kg。

中国旧石器时代美术主要体现在作为工具的（）。

截至2009年底，全国共有生产力促进中心1808家，其中，国家级示范生产力促进中心共有207家，分布在海南外的30个省、市、自治区。

2009年平均每个国家级示范中心约实现了多少万元人民币的收入（）

A．170

B．717

C．1084

D．1486

SY/T6267-2006（高压玻璃纤维管线管规范）中：环向拉伸模量概念？