单选题What is the main idea of the story?

单选题Scientists can predict regions ______ new species are most likely to be found.

单选题 In the beginning of the movie I, Robot, a robot has to decide whom to save after two cars plunge into the water—Del Spooner or a child. Even though Spooner screams 'Save her! Save her!' the robot rescues him because it calculates that he has a 45 percent chance of survival compared to Sarah's 11 percent. The robot's decision and its calculated approach raise an important question: would humans make the same choice? And which choice would we want our robotic counterparts to make? Isaac Asimov evaded the whole notion of morality in devising his three laws of robotics, which hold that 1. Robots cannot harm humans or allow humans to come to harm; 2. Robots must obey humans, except where the order would conflict with law 1; and 3. Robots must act in self-preservation, unless doing so conflicts with laws 1 or 2. These laws are programmed into Asimov's robots—-they don't have to think, judge, or value. They don't have to like humans or believe that hurting them is wrong or bad. They simply don't do it. The robot who rescues Spooner's life in I, Robot follows Asimov's zeroth law: robots cannot harm humanity (as opposed to individual humans) or allow humanity to come to harm—an expansion of the first law that allows robots to determine what's in the greater good. Under the first law, a robot could not harm a dangerous gunman, but under the zeroth law, a robot could kill the gunman to save other. Whether it's possible to program a robot with safeguards such as Asimov's laws is debatable. A word such as 'harm' is vague (what about emotional harm? Is replacing a human employee harm?), and abstract concepts present coding problems. The robots in Asimov's fiction expose complications and loopholes in the three laws, and even when the laws work, robots still have to assess situations. Assessing situations can be complicated. A robot has to identify the players, conditions, and possible outcomes for various scenarios. It's doubtful that a computer program can do that—at least, not without some undesirable results. A roboticist at the Bristol Robotics Laboratory programmed a robot to save human proxies (替身) called 'H-bots' from danger. When one H-bot headed for danger, the robot successfully pushed it out of the way. But when two H-bots became imperiled, the robot choked 42 percent of the time, unable to decide which to save and letting them both 'die.' The experiment highlights the importance of morality: without it, how can a robot decide whom to save or what's best for humanity, especially if it can't calculate survival odds?

单选题 南京 南京是中国东部重要的政治、文化和金融中心。自三国时期(the Three Kingdoms Period)开始，先后有六个朝代在此建都，因此南京有“六朝古都”(the Ancient Capital of Six Dynasties)的美誉。南京城建于明朝，是中国现存规模最大的古城。南京不仅是一座著名的历史文化名城，也是极具特色的现代化城市。它是先进的制造业基地，也是仅次于北京、上海的第三大科教中心城市。由于地处长江下游，靠近东海，南京是中国重要的交通和通讯枢纽(hub)。2014年，第二届夏季青年奥林匹克运动会(Summer Youth Olympic Games)将在南京举办。

单选题As far as rank is concerned, an associate professor is ______ to a professor, though they are almost equally knowledgeable. [A] attached [B] subsidiary [C] previous [D] inferior

单选题No one would have time to read or listen to an account of everything ____________going on in the world.

单选题 These toys are so ______ that children's parents can hardly afford them.

单选题When any non -human organ is transplanted into a person, the body immediately recognizes it as ______.

单选题Only when the police _____ her with evidence did she admit that she had stolen the money.

单选题How do all food chains break?

单选题 Which of the following italicized parts does NOT serve as an appositive?

单选题The general opinion is that he is ______ to complain.

单选题We say Columbus made the world larger, that is to say ______.

单选题The bridge was named______the hero who had given his life to save a child.

单选题The minister's ______ answer led to an outcry from the Opposition.

单选题One of the things she (wrote) (about) (were) life on a small farm at the (beginning) of the century.A. wroteB. aboutC. wereD. beginning

单选题 Listen to the following passage. Altogether the passage will be read to you four times. During the first reading, which will be done at normal speed, listen and try to understand the meaning. For the second and third readings, the passage will be read sentence by sentence, or phrase by phrase, with intervals of 15 seconds. The last reading will be done at normal speed again and during this time you should check your work. You will then be given 1 minute to check through your work once more. History of the Olympic Games The first Olympic Games for which we still have written records/were held in 776 BCE.

单选题City officials are considering building a path to give the public ______ to the site.

单选题下面的短文后列出了10个句子，请根据短文的内容对每个句子作出判断：如果该句提供的是正确信息，选择A；如果该句提供的是错误信息，选择B；如果该句的信息文中没有提及，选择C，并将所选答案的代码（指A、B或C）填在答题纸的相应位置上。The Thinking Habit That Changed My Life　　I remember one evening three years ago, when