如图所示，物体重180N，动滑轮重20N，绳重和摩擦不计。在拉力 F的作用下，物

☆÷8=39…□，要使□里的数最大，☆应是______．

中华人民共和国成立后，中央人民政府颁布的第一部法律是( )。

A．《中华人民共和国宪法》

B．《中华人民共和国婚姻法》

C．《中华人民共和国刑法》

D．《中华人民共和国行政法》

阅读理解。

     Tom Brennan was working in a Philadelphia office building when he noticed a black bag. The bag

contained a book.

     This chance discovery ended a 12-day search by the Library Company of Philadelphia for a historical

treasure--a 120-page diary kept 190 years ago by Deborah Logan, "a woman who knew everybody in her

day," James Green, the librarian told the magazine American Libraries.

      Most of the diary is a record of big events in Philadelphia. It also includes a description of British

soldiers burning Washington D.C. in the war of 1812. She describes President James Madison on horseback

as "perfectly shaking with fear" during the troubled days. George Washington, she writes, mistook her for

the wife of a French man, and praised her excellent English. The adventure of the lost book began

September 4 when Cory Luxmoore arrived from England to deliver the diary of his ancestor to the Library

Company, which he and his wife considered to be the best home for the diary.

     Green told American Libraries he had the diary in his possession "about five minutes" when Luxmoore

took it back because he had promised to show it to one other person. On returning to his hotel after showing

the precious book to Green, Luxmoore was shocked to realize that he had left it in the taxi.

     Without any delay, Green began calling every taxi company in the city, with no luck, "I've felt sick

since then," Luxmoore told reporters. According to Green, no one has yet learned how the diary came to

the office building. Tom Brennan received a reward of 1,000, Philadelphia gained another treasure for its

history, and Luxmoore told reporters, "It's wonderful news. I'm on high".

1. This article mainly tells about the story of _____.

A. a lost diary

B. Deborah Logan

C. Cory Luxmoore

D. the Library Company

2. From the text, we learn that the diary is now owned by _____.

A. Tom Brennan

B. an unknown person

C. a Philadelphia magazine

D. the Library Company of Philadelphia

3. Philadelphia is thought to be the best home for the diary because ______.

A. it was written in Philadelphia

B. it tells stories about Philadelphia

C. people in the city are interested in old things

D. the British and the Americans once fought in Philadelphia

4. What did Cory Luxmoore mean when he said "I'm on high"?

A. I'm rich

B. I'm famous

C. I'm excited

D. I'm lucky.

在我国，利润损失险负责赔偿利润损失的情况是（）

A．由于被保险人计划不周造成的利润减少

B．由于被保险人违反政府法令造成的利润减少

C．由于市场价格下降造成的利润减少

D．由于火灾造成的被保险人正常经营能够实现的利润的减少

各部门经理每月根据行动计划实施客户满意度管理工作，负责对改进活动进行监控，主要内容包括什么？