Biodiversity(生物多样性), or biological diversity, is a wide

题文

Biodiversity(生物多样性), or biological diversity, is a wide-ranging concept that covers all the different kinds of plant and animal species prent on earth. Environmentalists believe that many millions of species exist. As all the living organisms are dependent on each other in some way, biodiversity is desirable. Any loss to the planet is actually a loss for mankind as well, and it is our responsibility to try and save Earth’s biodiversity.Biodiversity has a vital role to play in the evolution（演变）of species. Species become extinct, but new species evolve, and this is how a balance is maintained. This may sound pretty simple, but it takes millions of years for changes to take place.Biodiversity is also very important to the stability of food webs. Damage to them can mean disaster for an entire ecosystem. The extinction of a single animal species can put huge pressure on the numerous other species dependent on it.Biodiversity also has an important role to play in human society. Apart from being the most intelligent species on earth, human beings are also the most dependent. We depend on nature to meet our basic needs. When we change the balance of nature to create our cities and bring about our technical advances, we knowing or unknowing cau great damage to the ecosystem. This must be understood, and the damages must be reverd（颠倒）in any way they can to ensure that the balance of the ecosystem is maintained. 小题1:We learn from the first paragraph that_________.A biodiversity can be enB all living species are found on earth.C people everywhere are aware of the importance of biodiversityD the loss of any species can affect humans小题2:Why can change in food webs lead to disaster?A Becau it can make people suffer from diaB Becau it can put huge pressure on some speciesC Becau it takes a long time for such changes to take placeD Becau it will damage ninety-nine percent of species小题3:What does the underlined word probably mean?A 画线  B Peace  C Strength  D Variety小题4:We learn from the last paragraph that __________.A humans are as independent as they are intelligentB the balance of the ecosystem is easily maintainedC nature has given us a lotD nature is taking revenge on us小题5:Which of the following may be the best title for this passage?A Food Webs are Cloly Related to Biodiversity.B Biodiversity Plays a Very important Role in EvolutionC How Biodiversity Affects Human Society.D Understanding Biodiversity and Its importance.

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答案

小题1:D小题2:B小题3:A小题4:C小题5:D

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解析

1.问题：从第一段中我们可以知道什么，答案：D任何物种的消失都会影响人类。从最后一句生物物种的的缺失也是人类的损失努力保护和拯救地球物种的多样性是我们的责任。2.问题：为什么改变食物链会导致灾难？答案：B。它会给某一物种带来巨大压力。3.问题：画线部分的单词意思可能是：不变。4.问题：最后一段我们可以知道答案C。从第一句中心句生物多样性对我们人类社会也起着重要的作用。5.下列哪项是最好的标题？理解生物多样性及其它的重要性。

考点

据考高分专家说，试题“Biodiversity(生物多样性),.....”主要考查你对 [科教类阅读 ]考点的理解。

科教类阅读

科普类的阅读：科普类的阅读理解包含介绍科学知识、社会知识的短文。阅读这类短文时，要以事实为中心进行思考，抓住事物的特征、用途、相互关系等。如果是介绍社会现象的文章，要掌握所谈现象的内涵。

答题技巧：1. 加强整体意识，把握文章的主要内容。在阅读的时候可给段落标上序号，并给重要的句子和   关键词做上记号，尤其是各段中心句，为答题提供更快捷更多的信息源。 2. 审清题干，发觉和把握试题中有效的提示性信息，确认命题的角度、阅读范围和答题方式。 3. 定位阅读，强化对应意识。同时要注意原文利用和自我加工相结合。