In the early 20th century, famous American economist elvin fisher developed the theory of economic gain. In its book "the nature of capital and yield", first, the concept of yield is analyzed in terms of the performance of earnings, and three different types of benefits are proposed: The development of automobile modeling was better aerodynamic design combined with seating comfort to be properly, in full consideration to the above two key problems, on the basis of efforts to develop new technology in the field of human body engineering, in order to design and make cars more perfect, more outstanding for the target. One day, the car cab will form a "glass cover" with beautiful curves. It is reflected in the geometry of the body, the round and the streamline. At that time, the paint of car colour will reflect soft feeling and transparent feeling in the bright-coloured, so will be more pleasing to the eye. Philip Hammond has been trying to persuade conservatives that tax increases and spending cuts are needed to reduce the deficit. We are in an era of economic, political, technological, social change and development. In this era, change and development bring both opportunities and risks to people, especially in the competition for market, resources and spheres of influence. If managers in seize opportunities and take advantage of opportunities at the same time, and to minimize risk, that is on the way forward towards the goals set up a bridge of convenient and secure, so organizations can be in an impregnable position, in the opportunities and risks of the vertical and horizontal choice, get survival and development. If you don't plan, or have no plans at all, you'll have disastrous consequences. Glasses, also known as eyeglasses or spectacles, are devices consisting of glass or hard plastic lenses mounted in a frame that holds them in front of a person's eyes, typically using a bridge over the nose and arms which rest over the ears. Glasses are typically used for vision correction, such as with reading glasses and glasses used for nearsightedness. Safety glasses provide eye protection against flying debris for construction workers or lab technicians; these glasses may have protection for the sides of the eyes as well as in the lenses. Some types of safety glasses are used to protect against visible and near-visible light or radiation. Glasses are worn for eye protection in some sports, such as squash. Glasses wearers may use a strap to prevent the glasses from falling off during movement or sports. Wearers of glasses that are used only part of the time may have the glasses attached to a cord that goes around their neck, to prevent the loss of the glasses. In such a simple deal, the details and considerations of the plan have exceeded what many traders can do in real deals. Therefore, it is not difficult to understand why so many people lose money in the foreign exchange futures market. Passenger car (no more than nine) are classified into ordinary passenger cars, active senior passenger cars, passenger cars, small passenger car, convertible, warehouse back passenger car, station wagon, multipurpose passenger vehicles, short head special passenger cars, off-road car, passenger car, etc. 11 class.