1. Read the following article and complete the following questions.

The main stadium of the 2008 Beijing Olympic Games-China National Stadium is located in the Olympic Park. Its design is very unique, and the appearance of the building is the structure of the building. The designer did not do any unnecessary treatment to the building, but frankly exposed the structure and naturally formed the appearance. The various components of the structure support each other to form a netted frame, and the whole stadium looks like a bird's nest woven with branches. This world-famous stadium will be of pioneering significance in the history of world architectural development.

The construction of "Bird's Nest" is divided into three steps: concrete structure construction, steel structure construction, interior and exterior decoration of the building and installation and debugging of electromechanical equipment. On September 17, 2007, the last link of the steel structure construction of the "Bird's Nest"-the overall unloading was successfully implemented, which means that the "Bird's Nest" has really changed from a design drawing to a giant building standing independently on the ground.

The large-scale steel structure building of "Bird's Nest" is the first time in the architectural history of China. During assembly, according to the capacity of the crane, the whole building is divided into four parts for steel structure installation, and gaps are left between the parts. These four gaps have a special function. When the steel structure is installed, its stress will change and accumulate internally due to the influence of temperature changes and other factors. These four gaps can release this change well. Then fold it, that is, the four parts are completely welded together to make it seamless. Because the original steel structure is not a whole and cannot form its own stress system, it must be supported by external forces, so it is supported by 78 steel columns. The so-called unloading of the whole steel structure means unloading the supporting steel columns after the closure, so that the "Bird's Nest" can stand upright in front of the world by relying on its own stress system. The process of uninstalling is very complicated. After the support steel column is removed, the stress will be redistributed due to the change of the stress point, forming a new stress system. In this process, the steel structure will deform and settle. In order to make the "Bird's Nest" bear stress steadily and gradually independently, after precise calculation and control, it was unloaded in 35 steps from the outside to the inside, and it was successfully carried out evenly, synchronously and continuously.

It is not easy to design and build the "Bird's Nest", and it is even more difficult to make the "Bird's Nest" full of vigor and vitality in the future.

The design and construction of the "Bird's Nest" fully embodies the concept of thrifty hosting the Olympic Games and adhering to sustainable development. On the premise of meeting the Olympic functions, the proportion of permanent facilities and temporary facilities should be reasonably allocated. On this basis, by realizing the multi-function of venues and spaces, the utilization efficiency of venues can be improved. "Bird's Nest" can not only host the opening and closing ceremonies and related sports competitions, but also meet various needs such as performances, exhibitions, business and fitness. At the same time, the design scheme fully reserves the post-game operation of the Bird's Nest, and there is no need for large-scale disassembly. Through simple upgrading, the commercial area can reach 50,000 square meters, which can be used as a supermarket, cinema or shopping center, greatly reducing the renovation cost and laying a solid foundation for the successful implementation of "post-Olympic development".

1. One of the following statements is ()

A It is the first time in the architectural history of China to build a stadium as large as the Bird's Nest, which is of pioneering significance.

B. The successful implementation of the overall unloading of the last link of the "Bird's Nest" construction means that it has changed from a drawing to a real building.

C. When the "Bird's Nest" steel structure is installed, its stress will change due to temperature changes and other factors, forming four cracks.

D 78 temporary supporting steel columns of the Bird's Nest shall be removed uniformly, synchronously and continuously from outside to inside.

2. Inferred from the context, the following "Bird's Nest" design scheme does not belong to the scheme that embodies the concept of "frugal hosting the Olympic Games and adhering to sustainable development" ()

A There are 654.38+10,000 seats in the stadium, of which 80,000 seats are permanent and the other 20,000 seats are temporary and can be removed after the games.

B. The seats are not neat. No matter where the spectators sit, the line-of-sight distance from the center of the stadium is about140m.

Hotel C is designed in the stadium, and will not start operation before and during the Olympic Games, but the right to operate after the Games has been pre-sold.

According to the plan, after the Olympic Games, the central area of the Olympic Park where the stadium is located will become a multi-functional public activity center.

3. According to the article, the design of China National Stadium is unique, and the meaning of "the appearance of the building is the structure of the building" is explained according to the context. (3 points)

A: Yes.