填空题

Modes of Transportation There are a variety of means for transportation. Usually, the choice of transportation depends on the (1) ______ of goods (1) ______ and the points of distribution. There are five major means of transportation: railroads, airplanes, ships, trucks, and pipelines. Often, goods may be transported by a combination of (2) ______. (2) ______ Railroads are best adapted to the transportation of (3) ______ products that are low in value in relation to their (3) ______ weight. Truck lines are effective for transporting high-value goods short distances. With the (4) ______, trucks can reach (4) ______ almost every destination without (5) ______ goods. Air freight (5) ______ used to be a means to speed (6) ______ or expensive but light (6) ______ products, but this changed with the introduction of (7) ______. (7) ______ Transportation by waterways is characterized by low cost and low speed. A new development is the use of (8) ______ships. (8) ______ Pipelines are a special form of transportation mainly used to move gasoline, crude oil and (9) ______, but they can also (9) ______ move (10) ______ like coal. (10). ______