患儿6岁，跛形步态，右下肢肌肉萎缩，且比左下肢缩短3cm，2岁时患脊髓灰质炎，现全身

（1）函数y= 1 3x-2 +lg（2x-1）的定义域 （2）计算 2 • 3 4 • 6 32 +lg 1 100 -3log32．

小明主动提出为当地图书馆建造一条供残疾人使用的轮椅斜面通道。斜面的设计方案还没有最后确定，所以小明利用长度一定的木板，做了如图9所示的斜面实验，通过增加书本来改变斜面的高度以寻找合适的斜面坡度，

实验数据如下：

实验次数	重力/N	升高/m	有用功/J	拉力/N	移动距离/m	总功/J	机械效率/%
1	5	0.15		2.2	0.5	1.1	68
2	5	0.20	1	2.7	0.5	1.35
3	5	0.25	1.25		0.5	1.55	81

 

（1）通过计算，求出以上表格中的空缺的数据。

（2）通过对表格中数据的分析，如果只考虑省力这个事实，你认为哪种坡度最适合轮椅使用？在决定坡度的时候还得考虑其它哪个因素？

Marriages improve after children grow up and move out，according to an academic study，

which suggests an“empty nest”is not always a bad thing．

Popular wisdom has it that parents’relationships may suffer once their young fly the coop，

because they feel they have lost their purpose in life．However,a new study by researchers at the

University of California,Berkeley，has found that many couples actually feel happier when their

children leave home because they are able to enjoy spending time together．

In total，123 American mothers born in the 1930s were tracked for 18 years and asked to rate

their satisfaction levels shortly after marrying,when they were bringing up babies，once their

children reached their teenage years and finally at age 61，when almost all had“empty nests”．

Although not all said they were happier in general，most claimed their marriages had improved since their children had left home．Researchers believe this is not just because the spouses were spending more time together,but because they were able to enjoy each other’s company more．

One of the participants in the study,which is published in the jourmal Psychological Science，

said：“Once the kids grow up…there’s some of that stress removed…that responsibility removed，so things are a little more relaxed．’’

Psychologist Sara Gorchoff,who carried out the investigation，said：“The take-home message

for couples with young children is‘hang in there’．”Her co-author Oliver John added：“Don’t wait until your kids leave home to schedule quality time with your partner．”   

However,Dr Dorothy Rowe，from the British Psychological Society，said the effects of living

in an“empty nest'”will depend on the parents’relationship with their children．“If yod’re just

waiting for them to leave home so you Can get on with your life，then of course you’11 be pleased to see them go，”she said，‘‘But if you’ve built your life around your children you’11 be terribly lonely．”For some parents，their world falls apart when their Children leave．’’

72．It is commonly believed that            

A．marriages improve after children leave home

B．an“empty nest'’is always a happy thing

C．parents’relationships may suffer once their young grow up and move out

D．parents will be pleased after their children leave home

73．When did many couples feel happier according to the study?

A．At age 61．when almost all had“empty nests”．

B．Shortly after marrying．

C．Once their children reached their teenage years．

D．When they were bringing up babies．

74．Marriages improve after children fly the coop not because         

A．many couples are able to spend time together

B．many couples arc able to enjoy each other’s company

C．things are a little more relaxed

D．many couples needn’t work at all

75．The author ofthe passage tends to agree that          ．    

A．parents should build their life around their kids

B．parents should schedule quality time with each other before kids leave home

C．parents’relationship with their kids has no effect on marriages at all

D．parents should be pleased to see their kids leave home

以一个人或几个人作样本，或以一个群体为一个单位作样本对某种教育现象或教育问题进行研究的方法称为（）

A.行动研究法

B.个案分析法

C.调查法

D.实验法

Part 3

Questions 19-25

·Read the following newspaper article and answer questions 19-25.
·For questions 19-25, choose the correct answerA, B, C or D.
·Mark your answers on the Answer Sheet.

A Talent Shortage Hits Green Start-ups

On May 1 applications closed for the first intake of a novel kind of executive-education programme. Set up by a bunch of venture-capital firms and other companies in New England, the three-month course will teach its "fellows" about renewable energy. To qualify for a fellowship, applicants must be successful entrepreneurs from other industries, such as IT or health care, and be zealous about profiting from greenery.
"A lack of talent, especially entrepreneurial talent, was one of the biggest bottlenecks to growth we identified in the clean-tech industry," says Peter Rothstein of Flagship Ventures, a venture-capital firm that is one of the programme’s founders. That bottleneck worries investors, who have been pouring cash into everything from solar energy to hybrid electric cars: last year global investment in renewable-energy businesses alone rose by 60%, to $148.4 billion, according to New Energy Finance (NEF), a research firm.
Although the prospect of minting money while helping to save the planet has attracted a stream of executives from other industries to clean-tech start-ups, few of them have much experience of their new field. In a recent global survey of 75 senior executives involved in clean-tech firms conducted by NEF and Heidrick & Struggles, a headhunter, over 90% cited top-level recruitment as a serious concern.
Counting on converts from other industries is risky, because some of the skills needed to run clean-tech companies are very different from those required to, say, launch a website. For one thing, the bosses of renewable-energy start-ups need to understand enough about the science to be able to pluck scientists from obscurity. For another, they need a grasp of project-financing techniques for costly prototype power plants. They also need to be able to deal with capricious regulatory and fiscal regimes. "If you’ve never done anything in the energy space, it can be intimidating,"says Bill Davis, the boss of Ze-gen, a start-up that generates electricity from waste.
Hence the New England bootcamp’s goal of helping 25 aspiring green entrepreneurs a year to make the transition. As well as giving them an overview of the latest scientific research, the course also includes sessions on project finance and government regulations.
Start-ups also face a battle for engineers and scientists. And as small firms take advantage of a growing enthusiasm for greenery in East Asia and the Middle East, they also need more staff with international experience. Tracking down such rare pearls can be a distraction for busy bosses.
Ann Cormack, the head of DI-BP Fuel Crops, a firm based in London that develops crops for biodiesel, reckons talent-spotting takes up about a fifth of her time. She has spent several months hunting for an agronomist, for instance, to no avail.
Like the bosses of many other clean-tech firms, Ms Cormack is using headhunters. They like the clean-tech business because wages, on which their commissions tend to be based, are rising fast. Not so long ago, executives would do meaningful green jobs for menial pay. But in recent years, wages have soared as the industry has grown and attracted big utilities and private-equity firms. Now what matters to the geeks is a different kind of green. "Good people can set their own price tag," says one recruiter, "and they want jam tomorrow, not in five years." It looks like they’ll get it.

Ann Cormack is cited as an example to illustrate ______.

A. how busy a boss ofa clean-tech firm is
B. how long it takes to find an agronomist
C. how a boss of a clean-tech firm looks for suitable candidates
D. how difficult it is for a boss ofa clean-tech firm to get a qualified employee