According to the latest research in the United States of America, men and women talk such different languages that it is like people from two different cultures trying to communicate. Professor Deborah Tannen of Georgetown University, has noticed the difference in the style of boys and girls conversations from an early age. She says that little girls conversation is less definite than boys and expresses more doubts. Little boys use conversation to establish status with their listeners.These differences continue into adult life, she says. In public conversations, men talk most and interrupt other speakers more. In private conversations, men and women speak in equal amountsalthough they say things in a different style. Professor Tannen believes that, for woman, private talking is a way to establish and test intimacy. For men, private talking is a way to explore the power structure of a relationship.Teaching is one job where the differences between mens and womens ways of talking show. When a man teaches a woman, says Professor Tannen, he wants to show that he has more knowledge, and hence more power in conversation. When a woman teaches another woman, however, she is more likely to take a sharing approach and to encourage her student to join in.But Professor Tannen does not believe that women are naturally more helpful. She says women feel they achieve power by being able to help others. Although the research suggests men talk and interrupt people more than women, Professor Tannen says, women actually encourage this to happen because they believe it will lead to more intimacy and help to establish a relationship.Some scientists who are studying speech think that the brain is preprogrammed for language. As we are usually taught to speak by women, it seems likely that the brain must have a sexual bias(倾向性) in its programming,otherwise male speech patterns would not arise at all.1. In the opinion of the writer, women encourage men to talk becauseA. it will lead to more intimacy and help to establish a relationshipB. it will help to establish status with their listenersC. it will help to express more clearlyD. it will help to communicate better2. There are_in little girls conversation than in boys.A. fewer doubts B. more demandsC. more doubts D. fewer uncertainties3. Some scientists believe that brain is pre-programmed for language. The word pre programmed means_.A. programmed already B. programmed before one is bornC. programmed early D. programmed by women4. In private conversation, women speakA. the same things as men B. less than menC. more than men D. as much as men5. The theme of this article is _.A. women are naturally more helpfulB. men and women talk different languagesC. men talk most and interrupt other speakers moreD. little girls conversation is less definiteIn the last two hundred years there have been great changes in the method of production of goods. This is now also true of the building industry; for mechanization has been introduced. System building can save both time and money. The principle of system building is that the building is made from a set of standard units. These are either made at the building-site or at a factory. Some designers, in fact, are standardizing the dimensions of rooms. They are made in multiples of a single fixed length, usually ten centimeters. This is called a modular (原则件旳) system, and it means that manufactures can produce standardized fittings at a lower cost. The most important fact about system building is its speed. A ten-storey flat, for example, can be completed in four months.There are several new methods of system building. One is the panel method. In this case, the construction company sometimes erects a factory on the site. The walls and floors of the building, called panels, are cast in a horizontal or vertical position. Conduits for electrical wires and sleeves for pipes are cast in the panels when they are being made. The moulds for making these castings are situated all around the building.After the concrete panels are cast, they are allowed to set and harden for a week. Next they are lifted by a tower crane on to any section of the building. There the panels are cemented together at their joints and the floor covering is laid.After the panels have been cemented together, the crane lifts a case into the area. It contains all the fittings to be installed, such as wash-basins, radiators and pipes. Finishing tradesmen, such as plumbers, plasterers, painters and electricians, follow behind to complete the work.In some building developments, in some countries, whole flats with internal features like their bathrooms, bedrooms and connecting stairs, and weighing as much as twenty tons, are carried to the building-site ready-made. A giant overhead crane is used to lift them into position. In the future, this method