题文
阅读理解。 Plants are flowering faster than scientists predicted (预测) in reaction to climate change, which couldhave long damaging effects on food chains and ecosystems.
Global warming is having a great effect on hundreds of plant and animal species around the world,
changing some living patterns, scientists say.
Increased carbon dioxide(CO2)in the air from burning coal and oil can have an effect on how plants
produce oxygen, while higher temperatures and changeable rainfall patterns can change their patterns of
growth.
"Predicting species' reaction to climate change is a major challenge in ecology," said the researches of
several U.S. universities. They said plants had been the key object of study because their reaction to
climate change could have an effect on food chains and ecosystem services.
The study, published on the Nature website, uses the findings from plant life cycle studies and experiments across four continents and 1,634 species. It found that some experiments had underestimated (低估)
the speed of flowering by 8.5 times and leafing by 4 times.
"Across all species, the experiments under-predicted the speed of the advance - for both leafing and
flowering - that results from temperature increases," the study said.
The design of future experiments may need to be improved to better predict how plants will react to
climate change, it said.
Plants are necessary for life on the Earth. They are the base of the food chain, using photosynthesis
(光合作用) to produce sugar from carbon dioxide and water. They let out oxygen which is needed by
nearly every organism on the planet.
Scientists believe the world's average temperature has risen by about 0.8? since 1900, and nearly 0.2?
every ten years since 1979.
So far, efforts to cut emissions(排放)of planet-warming greenhouse gases are not seen as enough to
prevent the Earth heating up beyond 2? this century - a point scientists say will bring the danger of a
changeable climate in which weather extremes are common, leading to drought, floods, crop failures and
rising sea levels.1. What is the key information the author wants to give in Paragraph 1?A. Plants' reaction to weather could have damaging effects on ecosystem.
B. The increasing speed of flowering is beyond scientists' expectation.
C. Climate change leads to the change of food production patterns.
D. Food chains have been seriously damaged because of weather.2. We can learn from the study published on the Nature website that ______.A. plants' flowering is 8.5 times faster than leafing
B. there are 1,634 plant species on the four continents
C. scientists should improve the design of the experiments
D. the experiments failed to predict how plants react to climate change3. Scientists pay special attention to the study of plants because _______.A. they can prove the climate change clearly
B. they are very important in the food chains
C. they play a leading role in reducing global warming
D. they are growing and flowering much faster than before4. What can be inferred from the last two paragraphs about the world's temperature?A. It has risen nearly 0.2? since 1979.
B. Its change will lead to weather extremes.
C. It is 0.8? higher in 1979 than that of 1990.
D. It needs to be controlled within 2? in this century. 题型：未知难度：其他题型
答案
1-4: BCBD解析
该题暂无解析
考点
据考高分专家说，试题“阅读理解。 Plan.....”主要考查你对 [健康环保类阅读 ]考点的理解。健康环保类阅读
健康环保累阅读概念：
健康环保类文章常是介绍科学知识、生活常识和环境保护方面的短文。体裁有记叙文、 说明文、议论文和各种应用文。
健康环保类文章阅读技巧：
健康环保类文章常是介绍科学知识、生活常识和环境保护方面的短文。阅读此类短文要以现象或事物为中心进行思考，理解现象产生的原因、条件和客观规律等。同时要抓住事物的特征、用途和相互关系等。科普环保类文章一般为说明文，从结构上看大致可分为三个部分：
第一部分一般是文章的首段，主要用来提出文章的主题，即文章想要阐述、说明的主要内容；
第二部分是文章的主体，可由若干个段落组成，对文章的主题进行展开说明；
第三部分是结尾段，对文章的主题进行归纳总结。这类文章多用一般现在时，而且一般多使用客观性词语表述。有时为了强调客观性，也常使用被动语态。
从近几年的考试题来看，科普环保类的文章越来越与人们的实际生活相接近。由于此类文章缺乏故事情节，很多同学对此类文章感到费解。但一般的科普类文章都是就事论事，需要逻辑推理和想象的时候较少，因此此类阅读题也没有同学们想象中的那么难，只要多加训练，就能较好地答题。
【阅读策略】
1、概要(Summarizing)：
阅完材料后，将所阅材料浓缩，摘要，做出所阅材料的书面或口头梗概。
2、组织(Organization)：
阅读后根据阅读内容，识别观点、人物、事件之间的关系以及文章的结构关系。如：时间关系、比较或对比关系、相关关系及因果关系等。
