听力原文：The term "satellite city" is used to describe the relationship between a large ci

听力原文： The term "satellite city" is used to describe the relationship between a large city and neighboring smaller cities and towns that are economically dependent upon it. Satellite cities may be collection and distribution points in the commercial linkages of a trading metropolis, or they may be manufacturing or mining centres existing with one-industry economies as the creatures of some nearby centre. This latter form. is what is generally meant when one uses the term "satellite city". Taken in this sense, nineteenth century Chicopee and Lowell, Massachusetts, were satellites of Boston. Both were mill towns created by Boston investors to serve the economy of that New England metropolis. Located on cheap land along water power sites in the midst of a farming region that could supply sufficient labor, they were satellites in the fullest sense of the term. Pullman, Illinois, and Gary, Indiana, were likewise one-industry towns created in conjunction with the much broader economy of nearby Chicago. Such places, as Vera Schlakman and Stanley Buder have pointed out in their excellent urban biographies, had a one-dimensional quality, a lack of social vigor. These cities could not stand alone; they were in a sense colonies of a multifunctional mother city.

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A．It is a self-sufficient community.

B．It offers cheap land to people.

C．It tends to concentrate on a single product.

D．It lies within a space station orbiting the earth.