【正文】 recognized but recognized as highly significant, because a team’s overall results can be more farreaching and have greater impact than what might have otherwise been possible for the person to acplish or contribute working alone.ListeningProfessorNow I want to tell you about what one pany found when it decided that it would turn over some of its new projects to teams of people, and make the team responsible for planning the projects and getting the work done. After about six months, the pany took a look at how well the teams performed.On virtually every team, some members got almost a free ride . . . they didn39。t surprise you to learn that when the real contributors were asked how they felt about the group process, their attitude was just the opposite of what the reading predicts.Another finding was that some projects just didn39。 it took many, many meetings to build the agreement among group members about how they would move the project along. On the other hand, there were other instances where one or two people managed to bee very influential over what their group did. Sometimes when those influencers said That will never work about an idea the group was developing, the idea was quickly dropped instead of being further discussed. And then there was another occasion when a couple influencers convinced the group that a plan of theirs was highly creative. And even though some members tried to warn the rest of the group that the project was moving in directions that might not work, they were basically ignored by other group members. Can you guess the ending to this story? When the project failed, the blame was placed on all the members of the group.TPO3ReadingRembrandt is the most famous of the seventeenthcentury Dutch painters. However, there are doubts whether some paintings attributed to Rembrandt were actually painted by him. One such painting is known as attributed to Rembrandt because of its style, and indeed the representation of the woman’s face is very much like that of portraits known to be by Rembrandt. But there are problems with the painting that suggest it could not be a work by Rembrandt.First, there is something inconsistent about the way the woman in the portrait is dressed. She is wearing a white linen cap of a kind that only servants would wearyet the coat she is wearing has a luxurious fur collar that no servant could afford. Rembrandt, who was known for his attention to the details of his subjects’ clothing, would not have been guilty of such an inconsistency.Second, Rembrandt was a master of painting light and shadow, but in this painting these elements do not fit together. The face appears to be illuminated by light reflected onto it from below. But below the face is the dark fur collar, which would absorb light rather than reflect it. So the face should appear partially in shadowwhich is not how it appears. Rembrandt would never have made such an error.Finally, examination of the back of the painting reveals that it was painted on a panel made of several pieces of wood glued together. Although Rembrandt often painted on wood panels, no painting known to be by Rembrandt uses a panel glued together in this way from several pieces of wood.For these reasons the painting was removed from the official catalog of Rembrandt’s paintings in the 1930s.ListeningProfessor:Everything you just read about Portrait of an Elderly Woman in a White Bonnet is true, and yet after a thorough reexamination of the painting, a panel of experts has recently concluded that it39。t part of the original painting. The fur collar was painted over the top of the original painting about a hundred years after the painting was made. Why? Someone probably wanted to increase the value of the painting by making it look like a formal portrait of an aristocratic lady.Second, the supposed error with light and shadow. Once the paint of the added fur color was removed, the original could be seen, in the original painting, the woman is wearing a simple collar of lightcolored cloth. The lightcolored cloth of this collar reflects light that illuminates part of the woman39。s why the face is not in partial shadow. So in the original painting, light and shadow are very realistic and just what we would expect from Rembrandt.Finally, the wood panel. It turns out that when the fur collar was added, the wood panel was also enlarged with extra wood pieces glued to the sides and the top to make the painting more grand and more valuable. So the original painting is actually painted on a singie p:ece of wood, as would be expected from a Rembrandt painting. And in fact, researchers have found that the piece of wood in the original form of Portrait of an Elderly Woman in a White Bonnet is from the very same tree as the wood panel used for another painting by Rembrandt, his Selfportrait with a Hat.TPO4ReadingEndotherms are animals such as modern birds and mammals that keep their body temperatures constant. For instance, humans are endotherms and maintain an internal temperature of 37176。Polar dinosaursOne reason for believing that dinosaurs were endotherms is that dinosaur fossils have been discovered in polar regions. Only animals that can maintain a temperature well above that of the surrounding environment could be active in such cold climates.s legs are positioned underneath its body, not at the body39。Haversian canalsThere is also a connection between endothermy and bone structure. The bones of endotherms usually include structures called Haversian canals. These canals house nerves and blood vessels that allow the living animal to grow quickly, and rapid body growth is in fact a characteristic of endothermy. The presence of Haversian canals in bone is a strong indicator that the animal is an endotherm, and fossilized bones of dinosaurs are usually dense with Haversian canals.ListeningProfessor:Many scientists have problems with the arg