题目

下图为“发达国家和发展中国家人口和国内生产总值比较”，其中代表发达国家的序号是（ ） A . ①② B . ③④ C . ②④ D . ①③ 答案：CThe amount of carbon taken in by growing plants increased from 1982 through 1999 astemperatures rose and the amount of carbon dioxide in the atmosphere increased. But a new studyin Friday ’ s edition of the journal Science found a drought - related decline in such plant growthfrom 2000 to 2009，even though temperatures continued to climb.As drought caused by warming reduces the land ’ s ability to take in carbon，the result couldbe more carbon dioxide left in the atmosphere，and thus more warming，Zhao Maosheng from theUniversity of Montana explained in a telephone interview.“This is a pretty serious warning that warmer temperatures are not going to endlessly improveplant growth ’” co - author Steven Running，also from the University of Montana ’ said in astatement. “ We see this as a bit of a surprise，and potentially significant on a policy level becauseprevious interpretations suggested global warming might actually help plant growth around theworld, “ he said.Instead, he and Zhao found a small but measurable decline of about 1%，compared to a6%increase in the past decade.Their study，based on the data collected by NASA satellites，found that north areas continuedto increase plant growth，thanks to warmer temperatures and a longer growing season.Someone commented, "This past decade’ s net decline in earthly productivity suggests that acomplex relationship between temperature, rainfall, cloudiness, and carbon dioxide, probably incombination with other factors such as nutrients(营养）and land management，will determinefuture patterns and trends in productivity.，，小题1:From the first paragraph, we can learnin the recent decade or so.A．the emission(排放)of carbon hasn’ t been reducedB．draught has been causing loss of soil and waterC．carbon dioxide levels have been risingD．the rise of temperature doesn' t promote the plant growth小题2:Zhao Maosheng really worried that .E.     more and more land will be abandonedF.    the climate becomes warmer and warmerG.   the emission of carbon dioxide increasesH.   draught further reduces the number of the plants小题3:Steven Running made his statement to  .I.      confirm Zhao' s views on the influence of temperature riseJ.     urge the government to take necessary measuresK.    warn the people to strengthen the plant protectionL.    support Zhao* s views on lhe plant production小题4:We can infer from the passage that  .A．global warming will determine the future productivityB．various factors play a key role jointly on future productivityC．earthly productivity actually increased in the past decadeD．temperature rise has had no effect on future producticity patterns