女性病人，57岁。因胆囊结石伴慢性胆囊炎、行经腹腔镜胆囊切除术。术中以1.5%的异氟

如图1所示，粗糙水平桌面上有一质量为m的铜质矩形线圈．当一竖直放置的条形磁铁从线圈中线AB正上方等高快速经过时，若线圈始终不动，则关于线圈受到的支持力F_N及在水平方向运动趋势的正确判断是           (　　)

A．F_N先小于mg后大于mg，运动趋势向左

B．F_N先大于mg后小于mg，运动趋势向左

C．F_N先小于mg后大于mg，运动趋势向右

D．F_N先大于mg后小于mg，运动趋势向右

Five years ago, David Smith wore an expensive suit to work every day. “I was a clothes addict,” jokes. “I used to carry a fresh suit to work with me so I could change if my clothes got wrinkled.” Today David wears casual clothes---khaki pants and sports shirt---to the office. He hardly ever wears necktie. “I’m working harder than ever,” David says, “and I need to feel comfortable.”

More and more companies are allowing their office workers to wear casual clothes to work in the United States. The change from formal to casual office wear has been gradual. In the early 1990s, many companies allowed their employees to wear casual clothes on Friday (but only on Friday). This became known as “dress-down Friday” or “casual Friday.” “What started out as an extra one-day-a-week benefit for employees has really become an everyday thing,” said business consultant Maisly Jones.

Why have so many companies started allowing their employees to wear casual clothes? One reason is that it’s easier for a company to attract new employees if it has a casual dress code. “A lot of young people don’t want to dress up for work,” says the owner of a software company, “so it’s hard to hire people if you have a conservative dress code.” Another reason is that people seem happier and more productive when they are wearing comfortable clothes. In a study conducted by Levi Strauss and Company, 85 percent of employers said that they believe that casual dress improves employee morale. Only 4 percent of employers said that casual dress has a negative impact on productive. Supporters of casual office wear also argue that a casual dress code helps them save money. “Suits are expensive, if you have to wear one every day,” one person said. “For the same amount of money, you can buy a lot more casual clothes.”

小题1:David Smith refers to himself as having been “a clothes addict” because_______.

A．he often wore khaki pants and a sports shirt

B．he couldn’t stand a clean appearance

C．he wanted his clothes to look neat all the time

D．he didn’t want to spend much money on clothes小题2:David Smith wears casual clothes now, because________

A．they make him feel at ease when working

B．he cannot afford to buy expensive clothes

C．he looks handsome in casual clothes

D．he no longer works for any company小题3:According to this passage, which of the following statements is FALSE?

A．Many employees don’t like a conservative dress code.

B．Comfortable clothes make employees more productive

C．A casual clothes code is welcomed by young employees

D．All the employers in the U.S are for casual office wear.小题4:In this passage, the following advantages of casual office wear are mentioned EXCEPT_______.

A．saving employees’ money

B．making employees more attractive

C．improving employees’ motivation

D．making employees happier

常温下，下列不发生反应的一组物质是

①铜与浓硫酸  ②二氧化硅与NaOH溶液 ③铜与浓硝酸 ④石英与纯碱

⑤铁与液氯    ⑥一氧化氮与氧气        ⑦硅与氧气   ⑧H₂S与SO₂

A．①②③⑥

B．②③⑥⑧

C．①④⑤⑦

D．①②③⑦

（13分）

服饰是一种历史记忆，也是一种语言、一种文化。它的变化是以非文本方式记录着社会政治、经济及文化的历史变迁。

材料一   中国明代服饰文化属于一元文化的范畴，具有整一性与大同观念，使得着装者注重群体意识，不强调个性。因而具有内在、内向、内涵、内倾的共同特点。“谦谦君子”成为着装的风范。文艺复兴时期服饰文化的特点突出地表现在服装为崇尚人体美服务，服装的作用在于充分显示人体的美感，显示男女性的特征。服装理念以追求人体美为核心，显示了外倾、外显、外向的特征。……其中最显著的特点是服装突出个性、显示个性。

——宗静等《中西合璧之美》

材料二 早在1852年匈牙利政治家弗朗西斯·帕尔斯在美国游历时，曾这样感叹，人们的服装毫无个性，表现不出不同的社会等级，而在东欧，外国人立刻可以从不同的衣着看出各种不同的职业和习惯。美国的“衣着民主”是其服饰上的一大特点，20世纪的美国人可能是穿着最讲究，穿着最相似的工业民族，缝纫机的大量使用以及生产的批量化：是造成这一特色的物质原因。

——《世界全史百卷本·世界近现代后期生活习俗史》

材料三 中山装的设计、制作和推广也是辛亥革命的一件大事情。关于中山装设计的特殊含义，前襟四个口袋——国之四维(礼、义、廉、耻)；前襟五个扣子——五权分立。

请阅读材料回答：

（1）据材料一分析中国明代和意大利文艺复兴时期服饰所体现的不同文化内涵。(6分)

（2）依据材料二，结合所学知识分析美国“衣着民主”的原因。（3分）

（3）材料三中山装的设计理念体现出孙中山哪些治国理念？(2分）其设计理念又折射出什么历史现象。(2分)

下面关于无面额股票的阐述正确的是( )。

A．无面额股票是指在股票票面上不记载股票面额，只注明它在公司总股本中所占比例的股票

B．无面额股票也称为比例股票或份额股票

C．无面额股票的价值随股份公司净资产和预期未来收益的增减而相应增减

D．我国的《公司法》允许发行无面额股票

E．无面额股票便于股票分割