碘伏用于外科手术及注射部位皮肤消毒的浓度是（） A.0.1~1% B.0.2~10%

雅典民主制是近现代西方政治制度的源头，它所创立的很多原则对后世影响深远．以下表格中对应关系错误的是

放射性同位素标记技术在生物学的研究中已被广泛应用。

(1)利用¹⁴C标记的CO₂研究植物光合作用中暗反应，¹⁴C的转移途径是____；若用¹⁸O标记H₂¹⁸O研究动物有氧呼吸的过程，则其最终出现在____(物质)中。

(2)在噬菌体侵染细菌实验中，获得S标记的噬菌体的方法是____。

(3)利用¹⁵N标记的氨基酸研究唾液腺细胞中的唾液淀粉酶的合成和分泌，则¹⁵N 首先出现在的具膜细胞器为____，最终含¹⁵N的唾液淀粉酶以____方式从细胞中分泌出去。

(4)a、b、c为三种DNA分子：a只含¹⁵N，b同时含¹⁴N和¹⁵N，c只含¹⁴N。将¹⁵N标记的DNA分子，放人含¹⁴N的培养基上连续扩增了4代，则a、b、c这三种DNA 分子所占的比例分别是____________。

(5)用船P标记的胰岛素基因探针，对小鼠胚胎干细胞和胰岛B细胞进行检测。

表格的空格中应填写的检测结果依次是____。(用“+”表示能检测到，用“-”表示不能检测到)。从实验结果分析可知，胚胎干细胞分化为胰岛B细胞的根本原因是_____________。

阅读理解。

(I)

     Recently, a solar powered plane took to the sky for the first time. It had passed an important test on the

way to travel around the world.

     The plane took off from an airport in Switzerland at 45 km an hour It slowly rose above the fields and

into the sky. During the 90-minute flight, the plane did several turns. It climbed nearly l.6 km above the

countryside.

     Engineers plan to test a night flight before July. Then they will use the results of the tests to build a second

plane. They plan to travel around the world in that plane in 2012. The plane flies at 70 km an hour. That is

faster than a bike and slower than a car. The pilots will keep the plane in the air for up to five days at a time.

(II)

     Cities and states with more sidewalks and bike paths tend to have slimmer residents than locations where

people must rely on vehicle transportation, according to a new study.

     The study shows active travel has significant health benefits, people who live in areas that are more

conductive (有益的) to walking and cycling are more likely 'to engage in these forms of active transport.

Researchers analyzed data from all 50 US states and 47 largest US cities, along with international data from

14 countries. Results showed that walking and cycling rates could explain more than half of the differences

in obesity rates among countries.

     The US doesn't measure up well in the study, coming in at No. 12 out of 14 0n percent-age of trips adults

take by bike or on foot. Australia came in last.

     The researchers suggest that in addition to infrastructure (基础设施) improvements, cities and states

should create restrictions on car use, such as car-free zones, reductions in motor vehicle speeds, and limit

more expensive car parking.

1. What information can we get from the first passage?

A. The first flight of the plane last 90 minutes.

B. The second plane will be bigger and fly faster.

C. The plane will fly for at most five hours at a time.

D. The plane uses no fuel and goes faster than a car.

2. The main purpose of the second passage is to _____.

A. promote a new way of car traveling

B. teach us how to keep residents slimmer

C. tell us people in "active cities" are slimmer

D. compare the living level of developed countries

3. It can be inferred from the second passage that _____.

A. Americans would take trips by car rather than by bike or on foot

B. all the US states and largest cities are involved with this survey

C. more expensive car parking can contribute to improve infrastructure

D. the number of bikes in Australia may be the greatest of the 14 countries

4. Which column of a newspaper may the two passages come from?

A. Food and Safety.

B. Science and health.

C. Culture and Communication.

D. Sports and Entertainment.

某施工企业年初购置1台机械设备，价值15万元，根据企业会计准则，该支出属于（）。

A．营业外支出

B．资本性支出

C．收益性支出

D．利润分配支出

FIDIC《施工合同条件》(新红皮书)是一种( )合同。

A．可调总价

B．固定总价

C．成本加酬金

D．单价