题目

若a＝－2×3 , b＝（－2×3） ,c＝－（2×3）而下列大小关系正确的是（  ）.A．a＞b＞cB．b＞c＞aC．b＞a＞cD．c ＞a＞b . 答案：C解析:由题意解得a＝-18，b＝36，c＝-36，故选CDo you want to control equipments with your mind? Do you want to power your home with the energy of your own activities? These are two of the developments that engineers at International Business Machines Company (IBM) think will come true within the next five years. The technology company has announced its latest “5 in 5” report.The engineers at IBM think people will soon be able to control many electronic equipments simply by using their minds. They say people will soon have a way to just think about calling or emailing someone in order to make it happen.Another thing that will happen is a way for people to power their homes and offices using energy from activities like walking or running. Bemie Meyerson, IBM’S President, says this is known as micro-electronic times.Also, passwords could soon become a thing of the past. IBM says technology developments could soon make passwords unnecessary. Some of the most common ways used to tell people are fingerprints, face and voice differences, and iris scans. The iris is the colored part of the eye. Bemie Meyerson says this technology will soon be more widely used by money machines and other designs.The fourth possibility on IBM’s “5 in 5” list is an end to the digital designs “between those who have technology and those who do not”.【1】According to Paragraph 2, you can control an electronic equipments by .A. writing an English email to it B. giving it a telephone callC. thinking about your thoughts D. ordering it in your voice【2】We know if micro-electronic times come true, people .A. will need to run in the house all dayB. will live a much more relaxing lifeC. will no longer need to go to their officesD. can produce electricity through activities【3】If you use iris scans to tell a person, you .A. have to use passwords at firstB. should show your fingerprintsC. need to look straight at the machineD. ought to speak to the machine aloud【4】What does the underlined word “password” in Paragraph 4 mean?A. 指纹 B. 密码 C. 声控 D. 拍照【5】What will most probably be talked about next after reading the passage?A. Inventions created by IBM in the past.B. People’s opinions on the developments.C. Something that will happen in the future.D. More information on the fourth possibility.