【正文】 or: Unfortunately none of the arguments about what the Chaco great houses were used for is c First, sure, from the outside, the great houses look like later and native American apartment ^ ut the inside of the great houses casts serious doubt on the idea that many people lived there. I39。 C, no matter whether the environment is warm or cold. Because dinosaurs were reptiles, and modern reptiles are not endotherms, it was long assumed that dinosaurs were not endotherms. However, dinosaurs differ in many ways from modem reptiles, and there is now considerable evidence that dinosaurs were, in fact, endotherms. Polar dinosaurs One 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. Leg position and movement There is a connection between endothermy and the position and movement of the legs. The physiology of endothermy allows sustained physical activity, such as running. But running is efficient only if an animal39。t contribute much at all, but if their team did a good job, they nevertheless benefited from the recognition the team got. And what about group members who worked especially well and who provided a lot of insight on problems and issues? Well . . . the recognition for a job well done went to the group as a whole, no names were named. So it won39。 job stability and harm their chances for advancing their careers. Fourday employees are likely to be the first to lose their jobs during an economic downturn. They may also be passed over for promotions because panies might prefer to have fiveday employees in management positions to ensure continuous coverage and consistent supervision for the entire workweek. TPO2 Reading In many anizations, perhaps the best way to approach certain new projects is to assemble a group of people into a team. Having a team of people attack a project offers several advantages. First of all, a group of people has a wider range of knowledge， expertise, and skills than any single individual is likely to possess. Also, because of the numbers of people involved and the greater resources they possess, a group can work more quickly in response to the task assigned to it and can e up with highly creative solutions to problems and issues. Sometimes these creative solutions e about because a group is more likely to make risky decisions that an individual might not undertake. This is because the group spreads responsibility for a decision to all the members and thus no single individual can be held accountable if the decision turns out to be wrong. Taking part in a group process can be very rewarding for members of the team. Team members who have a voice in making a decision will no doubt feel better about carrying out the work that is entailed by the decision than they might doing work that is imposed on them by others. Also, the individual team member has a much better chance to “ shine” , to get his or her contributions and ideas not only 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. Listening Professor Now 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。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 Bon is from the very same tree as the wood panel used for another painting by Rembrandt, his Selfportrait with a Hat. TPO4 Reading Endotherms 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。s true. The dinosaur bones also have growth rings. Growth rings are thickening of the bone that indicates periods of time when the dinosaurs weren39。t well supported either. You know that mound at Pueblo Alto? It contains lots of other materials besides broken pots, stuff you wouldn39。s not. And in practice, the judgments of the group of academics that make these decfsions don39。 decisions only when the price of one peting products is much higher or lower than the the difference between two products is small ,say , less than 5 percent,as is the case with certified wood, American often do choose on factories other than Americans are being increasingly convinced of the value of preserving and protecting the environment. And third, US Wood panies should definitely pay attention what is going on in the wood business because of foreign consumers but because of foreign petitors. As I just told you,there is a good chance that many American consumers will be interested in ecocertified products, and guess why? If American panies are slow capturing those consumers,you can be sure that foreign panies will soon start crowding into the American markets ,o