[填空题]
{{B}}Modes of Transportation{{/B}}
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
