一个长方形，长a厘米，宽b厘米，如果在它的四角各剪去一个边长1厘米的正方形，那么

治疗过敏性紫癜应用肾上腺皮质激素的目的是

A．阻止紫癜发展

B．缓解腹痛

C．缓解关节痛

D．减轻肾脏损害

E．预防紫癜性肾炎

增感率

阅读理解。

     As a young boy, I lived in a poor suburban neighborhood. I often wandered around the

neighborhood alone, and offered to help mow a lawn or wash some walls in exchange for

some pocket money just to buy something I needed, such as some school clothes or candy.

     One day, I knocked at an old woman's door and asked if she needed her walls washed.

She asked why I wasn't in school and I showed her my pants and shoes, which were torn

and no longer keeping my feet warm. She allowed me to work in the yard for pretty much

that entire day. When I was finished, I knocked on her door and she looked at me. "I

suppose you want to be paid now," she said.

     "Yes, ma'am, I do."

     She asked what my fee was. I hadn't thought about this and made no answer. She said,

"Well, come inside," and then she came in and pulled out a big jar which was filled with

dollar bills. She said, "Though you've done a fine job today, that isn't something you should

be doing again. I want you to buy some pants and new shoes and get back in school. I

also want you to come back and visit me with your report card and I'll reward you when

I see your good marks. Now reach in with your hands and take out as much as possible."

     I reached in and grabbed lots of money, which was enough for me to buy those I

needed. I returned several times to see the woman and yes, she did just as she promised.

She looked at my report card and gave me a handful of dollars and a sandwich every time

I showed her I had an "A" or "B"．

     I'll never forget the huge difference this wonderful stranger made over my life with her

generosity and kindness; this is something I hope to do myself in my life.

1．What was the writer's purpose of helping his neighbors?(No more than 10 words)

________________________________________________________________________

2．Why did the writer show the old woman his torn pants and shoes? (No more than 10

words)

________________________________________________________________________

3．On what condition would the old woman reward the writer? (No more than 8 words)

________________________________________________________________________

4．What would the writer most probably do in his life? (No more than 9 words)

________________________________________________________________________

应完善对项目创新性的评价标准，对基础研究全面引入（），评价重点从成果数量转向成果质量和原创价值。

A.同行评价

B.社会评判

C.上级评定

D.自我评估

电子邮箱的使用方法通常有（）。

A、2种

B、4种

C、6种

D、8种