单选题《复合题被拆开情况》 Soot—also known as black carbon—heats up the atmosphere because it absorbs sunlight. But for years the institutions that focus on climate policy have played down the role of pollutants such

单选题The government of Burkina Faso granted scientists permission to release genetically engineered mosquitoes anytime this year or next，researchers announced Wednesday.Its a key step in the broader e

单选题. Questions 8 to 11 are based on the conversation you have just heard.1.

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单选题Competition makes losers as well as winners.This fact makes a simple rule for judging when it is useful to society and when it is dangerous.Can we afford to look after the losers?They are not going to

单选题 —Where are the children

单选题. The AlphaGo program's victory is an example of how smart computers have become. But can artificial intelligence (AI) machines act ethically, meaning can they be honest and fair? One example of AI is driverless cars. They are already on California roads, so it is not too soon to ask whether we can program a machine to act ethically. As driverless cars improve, they will save lives. They will make fewer mistakes than human drivers do. Sometimes, however, they will face a choice between lives. Should the cars be programmed to avoid hitting a child running across the road, even if that will put their passengers at risk? What about making a sudden turn to avoid a dog? What if the only risk is damage to the car itself, not to the passengers? Perhaps there will be lessons to learn from driverless cars, but they are not super-intelligent beings. Teaching ethics to a machine even more intelligent than we are will be the bigger challenge. About the same time as AlphaGo's triumph, Microsoft's 'chatbot' took a bad turn. The software, named Taylor, was designed to answer messages from people aged 18-24. Taylor was supposed to be able to learn from the messages she received. She was designed to slowly improve her ability to handle conversations, but some people were teaching Taylor racist ideas. When she started saying nice things about Hitler, Microsoft turned her off and deleted her ugliest messages. AlphaGo's victory and Taylor's defeat happened at about the same time. This should be a warning to us. It is one thing to use AI within a game with clear rules and clear goals. It is something very different to use AI in the real world. The unpredictability of the real world may bring to the surface a troubling software problem. Eric Schmidt is one of the bosses of Google, which owns AlphaGo. He thinks AI will be positive for humans. He said people will be the winner, whatever the outcome. Advances in AI will make human beings smarter, more able and "just better human beings."1. What does the author want to show with the example of AlphaGo's victory? ______

单选题In much of the rich world 65 still marks the beginning of old age.Jobs end，subsidized bus travel begins and people start to be seen as a financial burden rather than an asset to the state.The larger t

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单选题《复合题被拆开情况》 Volumes have been written about technology’s ability to connect people. But burying one’s nose in a book has always been somewhat isolating—with its unspoken assertion that the reader does

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单选题. Questions 8 to 11 are based on the conversation you have just heard.1.

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单选题《复合题被拆开情况》 The music sounds, at first, like it belongs in a power yoga studio: electronic and rhythmic, rising and falling like breaths. But then a higher pitch juts 深入 into the mix, and the strains

单选题. A proverb allegedly from ancient China was widely spread in the West: "If you want to be happy for a few hours, go to get drunk; if you want a lifetime happiness, take up gardening." The reason for the last option is this: Gardening is not only useful, but it helps you to identify yourself with nature, and thus brings you new joy each day besides improving your health. A research of a US university that I've read gives a definition of happiness as what makes a person feel comfortably pleased. To put it specifically, happiness is an active state of mind where one thinks one's life is meaningful, satisfactory and comfortable. This should be something lasting rather than transitory. Lots of people regard it the happiest to be at leisure. But according to a study, it is not a person with plenty of leisure but one at work that feels happy, especially those busy with work having little time for leisure. Happiness does not spell gains one is after but a desire to harvest what one is seeking for. People often do not cherish what they already have but yearn for what they cannot get. That is somewhat like a man indulging in fond dreams of numerous lovers while reluctant to settle down with the woman beside him. Happiness is a game balancing between two ends—what one has and what one wishes for, e.g. one's dream and the possibility to realize it. The study comes to this conclusion: A happy man is one who aims high but never forgets his actual situation; one who meets challenges that tap his ability and potentiality; one who is proud of his achievements and the recognition given to him. He has self-respect and self-confidence; treasures his own identity and loves freedom. He is sociable and enjoys wide-range communication with others; he is helpful and ready to accept assistance. He knows he is able to endure sufferings and frustrations; he is sensible enough to get fun from daily chores. He is a man capable of love and passion.1. According to the passage, gardening can bring lifelong happiness because ______.