按交错合同论，下列正确的是（）。 A.一个社会中所有的定货合同交错签订 B.一个社会

二十三岁男性患者，双髋及腰骶部疼痛3个月，尤以夜间明显，伴呼吸活动轻度受限。

如需确诊，下列哪项检查意义最小()

A．骶髂关节X线片

B．床边(Gaenslen征)试验

C．HLA-B27

D．ASO

E．血沉

关于农作物，下列说法正确的是：

A.中国是最早栽培大豆的国家 

B.玉米是通过丝绸之路传入中国的 

C.花生是世界上最主要的油料作物 

D.印度是世界上最大的稻米出口国

在图所示的电路中，当电键K闭合后，电流表A的示数为零，电压表V₁的示数为6V，电压表V₂的示数为零。导线、电表、电键及各接线处均无问题，这说明断路的是：（ ）

A．电阻

B．电阻

C．电阻

D．串联电池组

第一位田园诗人：（）

阅读理解。

     Earlier this month, the Obama Administration called for increased protection of the world's most southern

continent, Antarctica. Scientists say climate change and human activity have increasingly led to the melting of

massive (大量的) pieces of Antarctic ice. The disappearance of ice will not only affect wildlife in the area such

as seals and penguins. The melting will also cause oceans and seas around the world to rise.

     This represents a major threat, especially to coastal areas. For example, the ancient city of Venice, Italy has

long been threatened by rising sea levels. The situation is made worse by the fact that its ancient buildings, built

on a body of water called a lagoon (淡水湖), are slowly sinking. When the city was founded about 1,600 years

ago, the level of the Adriatic Sea was almost two meters lower than it is today.

     Rising sea levels are not the only threat. The salty water is also destroying Venice's famous buildings and art

works. The Italian government is trying to fix the problem with the construction of a seven-billion-dollar system

of moving flood barriers.

     Climate change is also leading to the melting of ice in other areas, such as Mount Kilimanjaro in northeastern

Tanzania. It is the highest point in Africa, measuring almost 6,000 meters. The mountain supports five vegetation

zones and many kinds of animals.

     The ice glaciers on the mountain are disappearing very quickly. This will have a bad effect on the mountain's

ecosystems (生态系统) and on Tanzania's travel industry. Also, a valuable record of thousands of years of weat

her history will also be lost if the ice melts. Scientists study pieces of glacier to understand weather patterns

from thousands of years ago.

     In the United States, the icy masses in Glacier National Park in Montana may soon completely disappear

because of climate change. In 1850, there were an estimated 150 glaciers in the more than 400,000 hectare (公

顷) park.

     There are 26 glaciers remaining today. Scientists estimate that the glaciers will be gone by 2030. Warming

temperatures are also threatening many kinds of plants and animals that live in this mountain ecosystem.

1. The writer developed the passage mainly by _____.

A. giving examples

B. listing reasons

C. making comparisons

D. using quotations

2. How many glaciers disappeared since 1850 in Glacier National Park?

A. 150.

B. 26.

C. 400,000.

D. About 124.

3. According to the passage, what has been affected in Italy by rising sea levels?

A. Many kinds of plants and animals died out in Italy.

B. Venice's famous buildings and artworks are being destroyed completely.

C. The ice glaciers on the mountain are disappearing very quickly.

D. Its ancient buildings could be drowned.

4. What could be the best title for the passage?

A. Climate Change

B. The Melting of Massive Pieces of Antarctic Ice

C. Visiting Endangered Places around the World

D. The disappearing of the Ice Glaciers