阅读理解。 Israeli rearchers say they have developed a substance that att

题文

阅读理解。 Israeli rearchers say they have developed a substance that attracts and kills the mosquitoes infected with the malaria parasite (疟原虫). However, the sweet-smelling substance is said to be harmless to people and animals, Scientists at Hebrew University in Jerusalem developed the sugary bait by combining fruit juice oils and boric acid (硼酸). The fruit juice oils get the attention of the mosquitoes, and the boric acid kills the incts when they eat it. The scientists took the sweet boric acid bait to the West African nation of Mali. They sprayed (喷洒) it on the plants near the man-made ponds which are home to "Anopheles Gambiae", the mosquitoes that carry the most deadly form of malaria (疟疾). The rearchers also placed a sweet-smelling spray on the grass near other ponds. But it contained no boric acid. Both of the substances also contained a substance that would mark any mosquito that came in contact with the bait.In this way the scientists could count the mosquitoes that fed on it. Yof Schlein, an expert on the incts that affect human healh，led the sweet bait rearch. He says thirty-eight days of results show the sweet boric acid bait proved very effective in killing mosquitoes. At the ponds treated only with sweet-smelling bait, Professor Schlein says, more than venty-five percent of mosquitoes fed on the fal bait. He says most people do not know that female mosquitoes feed on sweet plant nectar to survive. The Israeli rearchers now hope to develop a bait that is even more desirable to the malaria mosquitoes. Boric acid is generally safe for human beings and other mammals. Professor Schlein says scientists might be able to develop a mosquito bait for enclod spaces. Boric acid has been ud to kill other incts, including cockroaches, termites and ants inside homes since the middle of last century.1. Which of the following is TRUE about the sweet-smelling substance? A. It is said to be harmless to people but harmful to animals.B. It attracts the mosquitoes but fails to kill them most of the time.C. It is actually created by Professor Schlein.D. It is a mixture of fruit juice oils and boric acid. 2. What does the underlined word "it" in Paragraph 2 refer to?A. A sweetsmelling spray.B. The fruit juice oil.C. A sweetsmelling spray with boric acid.D. The sweet boric acid bait. 3. What do we know about Yof Schlein?A. He offered help to the rearchers in the sweet bait rearch.B. He is an expert on the substances that affect human health.C. He thinks the sweet boric acid bait kills the malaria mosquitoes very effectively.D. He thinks most people know female mosquitoes feed on sweet plant nectar to survive.  4. We can infer from the text that _____.A. there will be fewer and fewer mosquitoes in Mali.B. the new mosquito killer has been widely ud in Africa.C. malaria will become the most dangerous dia in the poorest areas of Africa.D. the Israeli rearchers want to develop a substance more attractive to the mosquitoes. 题型：未知难度：其他题型

答案

1-4 DACD

解析

该题暂无解析

考点

据考高分专家说，试题“阅读理解。 Isra.....”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。