阅读理解 Tongue clicking is an important part of language for some souther

题文

阅读理解 Tongue clicking is an important part of language for some southern African groups. And it could help disabled people control their wheelchairs. The key is a device that is put in the ears and listens for tongue clicks and then translates the sounds into commands for a wheelchair. Mouth interfaces (接口)that interact with wheelchairs are already common for riously disabled people. One device that fits within the roof of the mouth hous buttons that can be presd with the tongue. "But everything that involves tongue movement requires putting something in the mouth," says Ravi, from the University of Bristol, UK. Besides issues of hygiene (卫生),the devices make it difficult for the ur to eat or speak, if they are able to ,while using it. Monitoring tongue movements through the ear avoids the problems. The new device, a simple microphone that looks like an earphone for listening to music, picks up certain sounds made by four sorts of tongue clicks. The microphone nds the information to a signal processor which sorts out the clicks and pass the information to the wheelchair, where each click type moves the chair in a distinct direction. Ravi's group has ud the interface to control a virtual wheelchair. They have also ud it to control the reaching and grasping movements of a robotic arm. The four tongue clicks can be mastered in a couple of hours, say the rearchers. "This is a promising technique," says Jo del R. Millan, who has been working on brain interfaces for controlling wheelchairs at the Swiss Federal Institute of Technology in Lausanne. If it can be combined with real wheelchairs and shown to work reliably it could be very valuable for patients, he says.  The rearchers plan to start using real wheelchairs, but in the meantime they are looking at whether the number of commands can be incread by using a microphone in each ear, to get clearer signals to the wheelchairs. "Even if four clicks prove to be the limit, it only takes 0.2 cond to detect each sound, so it's possible to spread high-level commands through combinations of clicking sounds," the rearchers say.1. What plays the most important role in controlling the wheelchair by tongue clicking?A. The tongue.B. The device.C. The wheelchair.D. the brain.2. What problem will be caud if mouth interfaces are ud to monitor the wheelchair?A. It is very difficult to operate the device.B. The device is dirty and leads to dia.C. The device makes it difficult for people to eat or speak.D. People are disturbed by the device when listening.3. What do we know about the new device according to the passage?A. It is actually an earphone ud to listen to music.B. It hasn't been put into practice to control wheelchairs.C. It can pick up all sounds made by tongue clicks.D. It can give orders where the wheelchair should go .4. What problem are Ravi and his groups trying to solve now?A. That the device can't detect more commands.B. That it needs a long time to detect each sound.C. That it can only combine some easy tongue clicks.D. That it takes a long time for the disabled to learn tongue clicks. 题型：未知难度：其他题型

答案

1-4: BCBA  

解析

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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。

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。