black

外语考试试题及答案解析

未知题型

The Price of Idleness
1．Electrical devices such as CD players, vidoes and burglar alarms are consuming more energy in standby mode than when they are actually being used.
2．Maria Sanchez and her colleagues from the Lawrence Livermore National Laboratory in Berkeley, California, tested more than 50 small electrical applicances, from computers to doorbells, electric mowers, VCRs, and pool pumps. In the current issue of Energy Policy, they report that about half of all consumer electronics energy is used in standby mode. This costs American consumers ＄1 billion a year in wasted energy.
3．The researchers say that while electronic devices are lying dormant(休眠状态),running their clocks, maintaining internal memories or displaying their settings, they consume aroud 40 terawatt hours of electricity in the U.S. every year--enough to power a city such as Chicago or London. Many machines use almost as much power on standby as when working. For example, it takes 15 watts to play a typical CD, but an average of 11 watts to keep it on standby. Satellite TV systems use 14 watts when active and 14 watts on standby. Given the long hours these systems spend idling, each uses far more power in standby mode than when actually working.
4．'Bad design is largely to blame,' says Sanchez. In a separate survey of CD players last year, her colleague Wolfgang Huber found that two machines with similar features used 28 watts and 2 watts respectively on standby. 'For most products, we believe that standby power can be reduced to one watt or less,' says Sanchez.
5．She backs proposals to set up a national labeling system to promote machines that meet this standard. Such a system could reduce standby power consumption in the U.S. by 50 per cent, says coauthor Alan Meier--more than 20 terawatt hours per year. Last month, electronics company Philips announced the launch of a device that can dramatically reduce the power used in standby mode.
A.Electrical
B.
2．Maria
C.
3．The
D.S.
E.
4．'Bad
F.
5．She
G.S.
H.
A
【参考答案】

D,D

相关考题

未知题型 听力原文：Woman: Please take off your coat and roll up your sleeve. I want to take your blood pressure. Yes, your pressure is a little bit high. There is nothing to be alarmed about it. But you'd better get rid of those junk food and do more exercises.(17)

未知题型 For this part, you are allowed 30 minutes to write a short essay on the topic of 'teaching methods' in three or four paragraphs. You should write at least 120 words following the outline given belowIntroduction: Basically there are two teaching methods.1. Lecture method:

未知题型 Americans this year will swallow 15,000 tons of aspirin, one of S1.______safest and most effective drugs invented by man. As the most popularmedicines in the world today, it is an effective pain reliever. Its bad S2.______effects are relatively mild, and it is cheap.For millions of people suffered from diseases, it is the only thing S3.______that works. Aspirin, in short, is truly the 20th-century wonder drug. Itis also the second largest suicide drug and is the leading cause ofpoisoning among children. It has side effects that, ff relatively mild, S4.______are largely unrecognized between users. S5.______Although aspirin was first sold by German company in 1899, ithas been around much longer than that. Hippocrates, in ancientGreece, understood the medical value of the leaves and tree barkwhich today is known to contain salicylates(水杨酸盐), the chemical S6.______in aspirin. During the 19th century, there was a great number of S7.______experimentation in Europe with this chemical, and it led in theintroduction of aspirin. By 1915, aspirin tablets were available in the S8.______United States.A small quantity of aspirin (two five-grain tablets) relieves painand inflammation. It also reduces down fever by interfering with some S9.______of the body's reactions. Specifically, aspirin seems to slow down theformation of the acids involved in pain and the complex chemicalreactions that cause fever. The chemistry of these acids is not fullyunderstood, and the slow effect of aspirin is well known. S10.______【S1】

All Rights Reserved 版权所有©在线考试题库网(zxkao.com)

备案号：湘ICP备14005140号-7

经营许可证号：湘B2-20140064