阅读理解 The koala, one of Australia's most treasured creatures, is in trouble.

题文

阅读理解 The koala, one of Australia's most treasured creatures, is in trouble.    Affected by habitat (栖居地) loss and climate change, like many other uniquely Australian animals, koalas are being squeezed into smaller regions. But at prent, it is a deadly dia, a somewhat silentkiller that caus a further decline in the koala population, that is worrying many scientists about the fate of the koala. The killer is Chlamydia, which has caud symptoms in up to 50 percent of the wild koalas, with probably even more infected (感染) but not showing symptoms. It has been particularly vere in Queensland, where nearly all koalas are infected. The dia caus many symptoms including eye infections, which can lead to blindness, making it difficult for them to find their primary food. Treating Chlamydia in wild koalas is a challenge. There is no treatment available for it. only a small percentage of the animals can be treated successfully and returned to the wild. Besides, there is no national plan in Australia to save the koala; it is up to each region to make management plans for its koala population. The good news is that rearchers are working to test a vaccine (疫苗) that would help prevent further spread. If all goes well, plans can be carried out to distribute the vaccine more widely. But it's impossible to vaccinate (给注射疫苗)  all wild koalas. Another possibility would be to make vaccine distribution a routine part of treatment for the thousands of koalas brought into care centers every year after they are injured by cars or dogs. While it is a combination of problems that are affecting the wild koala population, many experts believe this vaccine would be an important step in helping koalas survive longer. It may be enough time to give rearchers a chance to solve some of the other problems facing Austalia's koalas.1. Which isn't considered the main cau of koala's population decline?A. A deadly dia. B. Injuries from cars and dogs.  C. Climate change. D. Habitat loss. 2. The third paragraph mainly tells us_____.A. the rious result Chlamydia has caud to the koala  B. Chlamydia affected the koala only in particular regions   C. the most rious symptom of Chlamydia is eye infections   D. Chlamydia can riously affect koala's primary food  3. We can learn from the text that the vaccine_____.  A. would cure the killer Chlamydia quite effectively B. would only be distributed in koala care centers   C. has already been put into practical u in Australia  D. cannot be distributed to all the infected koalas  4. It can be inferred from the text that_____. A. a national plan for saving koalas will be made soon in Australia  B. koala population is declining only in a few regions   C. rearchers need enough time to solve the koala problems  D. experts have lost the best chance to save the infected koalas 题型：未知难度：其他题型

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1-4 BADC

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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。

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   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。