题目内容
（请给出正确答案）
A great deal has been done to remedy the situation.
A．maintain
B．improve
C．preserve
D．protect
简答题官方参考答案
（由简答题聘请的专业题库老师提供的解答）
更多“A great deal has been done to remedy the situation.A．maintainB．improveC．preserveD．protect”相关的问题
A．Going to church.
B．Going to work in the office.
C．Staying at home,
D．Going to A party.
A．polluted
B．downgraded
C．mixed
D．blackened
A．Right
B．Wrong
C．Not mentioned
The new electrical cables at the Frisbie power station in Detroit are revolutionary because they are made of superconductors.A superconductor is a material that transmits electricity with little or no resistance.Resistance is the degree to which a substance resists electric current.All common electrical conductors have a certain amount of electrical resistance.They convert at least some of the electrical energy passing through them into waste heat.Superconductors don’t.No one understands how superconductivity works.It just does.
Making superconductors isn’t easy.A superconductor material has to be cooled to an extremely low temperature to 10se its resistance.The first superconductors，made more than 50 years ago，had to be cooled to一263 degrees Celsius before they lost their resistance.Newer superconducting materials 10se their resistance at一143 degrees Celsius.
The superconductors cable installed at the Frisbie station is made of a ceramic material that contains copper.oxygen.bismuth(铋)。strontium(锶).and calcium(钙).A ceramic is a hard.strong compound made from clay or minerals.The superconducting ceramic has been fashioned into a tape that is wrapped lengthwise around a long tube filled with liquid nitrogen.Liquid nitrogen is supercold and lowers the temperature of the ceramic tape to the point where it conveys electricity with zero resistance.
The United States loses an enormous amount of electricity each year to resistance.Because cooled superconductors have no resistance.they waste much less power.0ther cities are watching the Frisbie experiment in the hope that they might switch to superconducting cable and conserve power too.
第6题：What is the benefit of the revolution mentioned in the first paragraph？
A．With a flip of swish．electricity can be transmitted．
B．Other American cities can benefit from the high·performance cables．
C．Great amounts of power can be conserved．
D．Detroit will first receive electricity transmitted by the new electrical cables
A．Right
B．Wrong
C．Not mentioned
A faithful
B royal
C sincere
D genuine
The Robot Man
According to Hans Moravec, universal robots will take over all the physical activities that we engage in, leaving us with little to do. Moravec sees four generations on the road to true universal robots. The first generation will be here by 2010 and will consist of free-ranging robots that can navigate by building an internal mental map of their surroundings. In new situations they'll be able to adapt, unlike today's mobile industrial robots. These robots will have the computing power,to cope with simple speech and text recognition, and will be used for tasks such as domestic cleaning.
The second generation will arrive around 2020 and will be distinguished by the ability to learn. Second generation robots are programd with sets of primitive tasks and with feedback that provide "pleasure" and "pain" stimuli. For example, a collision provokes a negative response, a completed task would be positive.
Move forward another ten years to 2030 and you get to generation three. This robot can build internal simulations of the world around it. Before= beginning a task, it can imagine what will happen in order to predict problems. If it has a free moment, it can replay past experiences and try variations in order to find a better way of doing things next time. It could even observe a person or-another robot performing a task and learn by imitation. For the first time, we have here a robot that can think.
By the time we get to generation four in 2040, Moravec predicts that robots will be able to: match human reasoning and behaviour; generalise abstract ideas from specific experience; and, conversely, compile detailed plans of action from general commands such as 'earn a living' or 'make more robots'.
The Moravec manifesto (宣告) runs something like this. As robots start to become useful in generation one, they'll begin to take on-many tasks in industry. Driven by the availability of this cheap and tireless labour force, the economy will boom and the demand for robots will grow so rapidly that they will soon become low-cost commodity items So much so that they'll move into the home, where the domestic robot will relieve us of many chores.
With increasing automation in generations two and three, the length of the average working day will plummet, eventually to near zero. Most people will be unemployed as robots take over not just primary industry, but the service economy too. Moravec sees the fourth generation as an opportunity to surpass our human limitations.
These future machines will be our "mind children". Like biological children of previous generations, they will embody humanity's best hope for a long-term future.
41 What will be the distinctive feature of the second generation robots？
A They will be able to learn by themselves.
B They will be able to recognize speeches and texts.
C They will be able to predict problems.
D They will be able to match human reasoning and behavior.
警告：系统检测到您的账号存在安全风险
为了保护您的账号安全，请在“简答题”公众号进行验证，点击“官网服务”-“账号验证”后输入验证码“”完成验证，验证成功后方可继续查看答案！
