单选题 Babies cry to call attention to their immediate needs: food, or rest, or a diaper change or cuddles. But without intending to, crying babies might also provide insight into a defining trait that will develop later in life. As Matt Stevens of the New York Times reports, a new study has found that the pitch of a baby's cry could predict what he or she will sound like as an adult. Researchers in the U.K. and France wondered if vocal pitch might be determined even earlier than age seven—during infancy, perhaps, or even in the womb (子宫). To find out, the team recorded the cries of 15 French babies—six girls and nine boys, from two to five months old. Researchers then compared those recordings to recordings of the same children at age four or five. The team found that the pitch of babies' cries was a 'substantial predictor' of vocal pitch at four or five years of age. 'Differences in voice pitch,' the researchers conclude, 'may—at least partly—arise very early in life.' The authors of the study suggest that these differences might develop in the womb, when fetuses are exposed to varying levels of hormones. As Carl Engelking of Discover reports, the team also analyzed the children's 2D:4D digit ratio, or the ratio between the lengths of the index finger and the ring finger. Studies have suggested that this ratio can reveal how much testosterone (睾丸激素) a person was exposed to in the womb. Researchers found that 2D:4D digit ratio in the right hand correlated positively with differences in vocal frequency in both baby cries and children's speech (this is consistent with other studies showing that 2D:4D ratios are expressed more strongly in the right hand). In other words, as a statement announcing the new research explains, 'if the index finger on the right hand is longer than the ring finger, a baby will be likely to grow up to have a high-pitched voice. Conversely, if it is shorter, they will be more likely to have a lower-pitched voice.'

单选题Among the following people, who mostly need to read this passage?

单选题Rumors are everywhere, spreading fear, damaging reputations, and taming calm situations into ______ ones.

单选题The private detective, having received new information from a confidential source, narrowed down the ______ of his enquiry into the case. A. aspect B. sphere C. dimension D. scope

单选题I don't doubt ______ the plan will be well-conceived.

单选题According to the passage, some doctors objected to the establishment of nursing schools because they believed that ______.

单选题Never has a scientific explanation emerged, ______ someone somewhere has objected to it.

单选题A government is said to "maximize justice" when it ______.

单选题It would be wildly optimistic to believe that these advances offset such a large reduction in farmland.

单选题She is trying to ______ him by phone as she has some very important news for him.

单选题The purpose of this passage is to ______.

单选题According to the author, what is one example of our loss of morality?

单选题 农历正月(the first lunar month)十五是中国的元宵节(Lantern Festival)，人们习惯在门外悬挂大红灯笼，孩子们提着彩色的灯笼玩，大人们则上街观赏各式各样的灯笼。据记载，灯笼早在约3 000年前就出现在了元宵节上。到了唐代，朝廷将灯笼与佛教(Buddhism)联系起来，从此点灯笼就成为了元宵节官方礼议的一部分。不同地区的彩灯风格迥异，陕北的农民用南瓜做灯笼，用棉花等材料做成羊头形状。而北京因为是帝王之都，灯笼一般都做成宫廷(imperial palace)灯笼的样子。

单选题He seemed in such an {{U}}inconsolable{{/U}} state that I didn't know whether to leave or stay.

单选题In the world no country has exactly the same folk music ______ that of any other countries．

单选题To be a successful criminal, one must be______.

单选题He phoned his uncle who lived in the country, asking him to ______ his two schoolmates for the weekend. A. assemble B. accommodate C. raise D. resemble

单选题 Mind-controlled Cars A. A car in Germany can be steered with thought alone. Rose Eveleth asks its driver and his team about the very difficult skills required to steer mind-controlled vehicles. Henrik Matzke is in the driving seat of a car, poised to make a very unusual move. The car pulls up to a junction. He concentrates for a moment, willing the car to turn. The steering wheel spins, and the car veers to the right, accelerating away. With his hands on his lap, Matzke is driving the car with thought alone, often at speeds up to 50km/h (31mph). B. He's part of a team at the Free University of Berlin working on what they call the Brain Driver—a project that's hoping to bring research into reading and interpreting brain signals into people's cars and homes. What is it like to control a one-and-a-half-tonne vehicle with your mind? C. The original premise behind Brain Driver was to build a system that someone with a physical disability can use to move through the world—as well as cars, the team has developed the technology for wheelchairs too. Brain Driver would, in theory, allow them to drive by simply thinking 'right' and 'left' and 'forward'. D. But turning that dream into a reality is as hard as it sounds. Adalberto Llarena, a roboticist with the Brain Driver project, says the team has faced two main challenges: the hardware and the humans. On the hardware side, they're trying to design a commercially practicable piece of equipment that can listen in on the brain's whispers and turn them into meaningful signals that power a machine. On the human side, they've got to develop something that real people can actually learn to use. E. The Brain Driver consists of a headset with 16 sensors that monitor electrical signals from the brain. Clinical devices usually use 32 sensors, but Llarena and his team are Wing to build something that's as small, cheap as possible. 'We think that 16 are probably too many,' he says. 'We're trying to figure out if we can take half of them out.' They're already working with tiny, micro-volt signals from inside the brain and Wing to read and interpret them. F. After reading these signals through the skull, the system has to turn them into instructions for the wheelchair or car. The idea is that the driver thinks one distinct thought to turn right, and another left, while the electrodes pick up the associated activity. G. But those thoughts won't necessarily be as simple as the words 'left' and 'right'; it could be something more abstract, like a certain place or a shape. 'It was a long process because I didn't know what to do at all. I was thinking of everything, the beach, red cubes, red circles.' Eventually he figured out that if he pictured a red cube in his mind, and then imagined that cube moving forward in his skull he could make the machine move forward. If he thought about that cube moving left, he could go left. H. 'In my case it was quite easy,' says Matzke, which prompts the rest of the team to laugh. 'The other guys are laughing because it's not working for them,' he explains. And that's the human challenge in making something like this work—training your brain to produce signals that the machine can interpret is really hard. Even Matzke, who was the natural in the group, said it took months to get confident enough to actually use a car or wheelchair. 'I got confident to about 70%,' he says 'but you can't get into a car and say, 'I'm 70% confident'.' After months of training, he was able to control a car through a course on a former airport—where there would be no risk of collision should a stray thought pop into his head (the car is not approved for public roads when under mind-control). I. He's not worried about the experience. 'It's not so weird,' he says, 'because we've already developed self-driving cars. If you're sitting in a car that's already driving itself, it's not that weird to drive it with your brain,' he says. J. But there are limitations. Right now, the instructions are binary—there's no way to make a slight left, or a slight right. Nor is there a way to control the speed moving forward. You also need to maintain total focus and relaxation while driving. K. Such difficulties have already frustrated owners of thought-controlled prosthetic arms (假肢). Training to use these requires months of work—a process many patients find tiresome. Some patients abandon the arm, saying it's just too hard to use. L. Llarena wants to avoid the same thing happening with brain driving, so they're working on simplifying the system. It'll rely less on ram-by-turn instructions from the brain, and more on allowing the brain to select locations and letting the chair or car do the rest. So, rather than steering the wheelchair around each individual turn, the user could simply think the signal for 'kitchen' and the chair would take them there. M. In the future, implanting electrodes in the brain could allow much finer control, says Omar Mendoza, an expert in brain signal processing who works with Llarena. 'You can get really good results in those cases,' he says—although even severely disabled people might be reluctant to have brain surgery to restore their mobility. N. Llarena and his team aren't the only ones trying to develop cars and wheelchairs for people who can't physically power them. A few years ago, Toyota worked on a brain-controlled wheelchair that users could start, stop and turn with their minds. And one team recently got a race car driver behind the wheel again. Rather than using brain signals, he controlled the car by tilting his head and gnashing his teeth. O. So far, nobody is ready to release brain-powered cars onto the roads or wheelchairs into the home. Before that can happen, they need an easier system to use and more robust methods that can jump in when a driver gets distracted or confused. 'On one side we have the programs, and on the other side we have the people who need to use these tools,' Llarena say. 'But in the middle we have the problem.' That is the gap that future designs will need to bridge, certainly before you see a thought-controlled car overtaking you on the road. For now Matzke is one of the few people in the world who has hit the road with his mind alone.

单选题A: We came so close, really. We almost won that game!B: ______.