单项选择题 Why Would They Falsely Confess?Why on earth would an innocent personfalsely confess to committing a crime? To most people, it just doesn't seemlogical. But it is logical, say experts, if you understand what can happen in apolice interrogation (审讯) room.Under the right conditions, people's mindsare susceptible (易受影响的)to influence,and the pressure put on suspects during policequestioning is enormous. __________(46)'Thepressure is important to understand, because otherwise it's impossible to understandwhy someone would say he did something he didn't do. The answer is: to put anend to an uncomfortable situation that will continue until he doesconfess.'Developmental psychologist Mary Redlichrecently conducted a laboratory study to determine, how likely people are toconfess to things they didn't do. __________(47) The researchers thenintentionally crashed the computers and accused the participants of hitting the'alt' key to see if they would sign a statement falsely takingresponsibility.Redlich's findings clearly demonstrate howeasy it can be to get people to falsely confess: 59 percent of the young adultsin the experiment immediately confesseD．__________ (48) Of the 15- to16-year-olds, 72 percent signed confessions, as did 78 percent of the 12- to13-year-olds.'There's no question that youngpeople are more at risk,' says Saul Kassin, a psychology professor at Williams College, who has done similar studieswith similar results.__________ (49)Both Kassin and Redlich note that the entire'interrogation' in their experiments consisted of a simpleaccusation--not hours of aggressive questioning--and still, most participantsfalsely confesseD．__________ (50) 'In some ways,' says Kassin,'false confession becomes a rational decision.' A．In her experiment, participantswere seated at computers and.told'not tohit the 'alt'key, becausedoing so would crash the systems.B．Because of the stress of apolice interrogation, they conclude, suspects can become convinced that falselyconfessing is the easiest way out of a bad situation.C．'It's a little likesomebody's working on them with a dental (牙齿的) drill,' says Franklin Zimring, a lawprofessor at the University of California at Berkeley.D．'But the baseline is thatadults are highly vulnerable too.'E．The court found him innocent andhe was released.F．Redlich also found that theyounger the participant, the more likely a false confession. 第 46 题 请选择（46）处的最佳答案．

未知题型 为了研究鸡的卵泡(egg follicle)数目的差异是否与遗传有关，是否能够通过鸡的产蛋量预测卵泡的数目，得到了如下的实验数据： 计算相关系数(correlation coefficient)。对上述数据作图，计算回归曲线的斜率以及y轴的截距，在同一个坐标图上画出回归曲线。

单项选择题 The Exploding Lakes of Cameroon What comes to mind when youthink of a lake? You probably imagine a pretty scene with bue water, brds, and fish. FOr the people in the northwestern Cameroon, however,the image is very different. For them, lakes may mean terdble disasters. In 1984,poisonous gases exploded out of Lake Monoun and came down into the nearby villages,killing thirty-seven people. Two years later, Lake Nyos erupted. A cloud of gases rolled down the hills and into the valleys and killed 1,700 people.Lake Nyos and Lake Monoun are crater (火山口) lakes. They were formed when water collected in the craters of old volcanoes. The volcanoes under Lake Nyos and Lake Monoun are not active anymore. However, poisonous gases from the center of the earth continue to flow up through cracks in the Bottom of the lake. This is normal in a crater lake.In most crater lakes, these gases are released often because the water 'turns over'regularly. That is, the water from the B．ottom of the lake rises and mixes with the water at the top, allowing the gases to escape slowly.However, in Lakes Nyos and Monoun, there is no regular turning over. No one knows the reason for this fact, But as a result, these lakes have more gases trapped at the bottom than other crater lakes. In fact, scientists who have studied Lakes Nyos and Monoun have found 16,000 times more gases. When a strong wind, cool weather, a storm, or a landslide(滑坡) causes the water to turn over suddenly, the gases escape in a violent explosion.In the past, no one knew when the gases might explode, so there was no way for the Villagers to escape disaster. Now scientists from the United States, France, and Cameroon have found a way to reduce the gas pressure at the bottom of Lake Nyos.They stood a 672-foot plastic pipe in the middle of the lake, with one end of the pipe near the bottom and the other end in the air. Near the top of the pipe, the team put several holes that could be opened or closed by a computer. Now, when the gas pressure gets too high, the holes are opened and some of the gas-filled water shoots up through the pipe into the air like a fountain. With less pressure, a disastrous explosion is much less likely. However, the scientists are not sure that one pipe will be enough to prevent explosions. They hope to put in others soon and they plan to install a similar pipe and a computer system at Lake Monoun as well.To protect people nearB．y until all of the pipes are in place, the scientists have installed early warning systems at both lakes. If the gas pressure rises to a dangerous level, computers will set off loud sirens(警报) and bright lights to warn the people in the villages. That way, they will have time to escape from the dangerous gases. 第 41 题 What will happen when Lake Nyos and Lake Monoun explode?A．Water will flow down the hills.B．Poisonous gases will bereleased suddenly. C．A strong wind will rise from the lakes.D．The volcanoes will come to life.