There are various ways in which individual economic units can interact with one another. These basic ways may be described as the market system, the administered system, and the traditional system.
What Will Space People Look Like?Once we are in space, the question arises—will we be the only ones? Will we find other intelligent beings plying (往返于) the space ways, and if so, what will the
If you are looking for information, library shelves are a good place to start. But if you need up-to-the-minute data or have specialized needs, you may find a computerized database more useful, less e
In order to give you as much help as possible, I have drawn up a list of questions that you ought to ask yourself.“Have I given thought to what I would like to be doing in 15 to 20 years from now?
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Are some people born clever, and others born stupid? Or is intelligence developed by our environment and our experiences? Strangely enough, the answer to both these questions is yes. To some extent ou
Homing pigeons are placed in a training program from about the time they are twenty-eight days of age. They are taught to enter the cage through a trap and to exercise above and around the loft(鸽棚
The difference between a liquid and a gas is obvious under the conditions of temperature and pressure commonly found at the surface of the Earth. A liquid can be kept in an open container and fill it
In today’s world, insurance plays a vital role in the economic and social welfare of the entire population. The wish to guard against dangers to life and property is basic to human nature. By using
Giving Credit Where Credit Is Not DueThe big identity-theft bust last week was just a taste of what’s to come. Here’s how to protect your good name.HERE’S THE SCARY THING about the identity-thef