下列说法正确的是 A．标准状况下，1 mol任何物质体积均为22.4L B．2g

北京大学的前身是1898年设立的（     ）。

A．燕京大学

B．京师同文馆

C．太学

D．京师大学堂

     Vans, Keds, Dollies-they sound like the names of rock bands, but if you have teenagers, you'll know

they're actually the latest in teenage footwear.

     But experts are now warning that the current shoe fashions will be causing teenagers discomfort in the

short term and storing up years of foot, knee and back pain in the future. Here, the experts identify the

problems caused by teenagers' shoe choice.

KEDS/VANS

     Slipon shoes with elastic (弹性的) sides are particularly  popular  among  teenage  boys-with Keds

and Vans the most soughtafter brands.

     The main problem is that they are just too flat-so flat that the heel, which strikes the ground first, also

becomes damaged and painful.

     BALLET PUMPS

     The worst shoes of all are such light and thin dolly shoes. The problem is partly their flatness, as with

Keds and Vans. However ballet pumps, which have no string or heel, have other specific problems.

     "As the shoe has no fastening device, it relies on the toes to keep the shoe on, causing an awkward

gait (步法) , this leads to short-and longterm problems such as calluses (茧子), heel and knee pain."

     WEDGES AND STILETTOS

     These shoes can also cause problems with gait. They may look good, but the heels on these are so

high they can force the wearer's body weight forward, making them very unstable.

Teens who wear these shoes regularly are also in danger of joining those millions of women with constant

back pain.

     SCHOOL SHOES

     So what do podiatrists (足科医生)have on their wish list, especially for everyday wear?

     Something in a natural, breathable fabric, with a string to hold it on, with a small heel and a deep

toebox that does not press the toes, such as Clark's, Marks & Spencer or Rhino.

     If your teen insists on wearing 'bad' shoes, get them some simple foot orthotics(矫形器) in the shoes.

These support and correct the movement of the foot and, properly fitted by a podiatrist, can often

transform their walk and halt the damage.

1. Of all the shoes mentioned in the passage, which can cause the worst problems?

A. Marks & Spencer.

B. Wedges & Stilettos.

C. Keds and Vans.

D. Ballet Pumps.

2. Which pair of shoes may NOT be found on the podiatrists' wish list?

3. The underlined word" halt" in the last paragraph probably means________.

A. increase      

B. worsen      

C. stop          

D. cure

4. From this passage we can infer________.

A. trendy shoes may ruin teenagers' health

B. fashionable shoes all have orthotics in them

C. experts are strongly against wearing popular shoes

D. podiatrists are expert at producing branded shoes

符合医学研究献身医学原则（）

A.仅从个人兴趣或追逐个人利益出发选择研究课题是不道德的

B.居里夫人把氯化镭包在自己的前臂上观察镭对人的皮肤的烧伤状况，表现了崇高的道德

C.由个人完成发明创造的时代，已经同爱迪生一去不复返了

D.1969年至1981年的12年间，年轻的心脏病研究者约翰·达西博士共编造假论文100篇以上

E.尸体解剖有利于医学的发展和总结医疗经验

简述农业技术经济效果评价指标的设置原则。

根据以下资料，回答以下问题。

2009年全国研究机构R＆D经费995.9亿元，是2000年的3.9倍，年平均增长16.2%。

按活动类型分，基础研究经费110.6亿元，占11.1%；应用研究经费350.9亿元，占35.2%；试验发展经费534.4亿元，占53.7%。基础研究、应用研究和试验发展经费分别是2000年的4.4倍、5.3倍和3.2倍。

按经费来源分，政府资金849.5亿元，占85.3%；企业资金29.8亿元，占3.0%；国外资金4.2亿元，占0.4%；其他资金112.4亿元，占11.3%。

按东、中、西部地区分，东部地区R＆D经费606.6亿元，占60.9%；中部地区146.5亿元，占14.7%；西部地区242.8亿元，占24.4%(分地区情况详见表1)。

2000年，基础研究经费占全国研究机构R＆D经费的比重为（）。

A.7.6%

B.9.8%

C.13.2%

D.15.4%