39.Reptiles are widely distributed all over the world, but are more abundant in warm regions and are virtually absent beyond the treeline in the Arctic.
40.Like light waves, microwaves may be reflected and concentrated.
41.Industrial buyers are responsible for supplying the goods and services that an organization require for its operations.
42.The easiest process for mining gold is panning, which involves using a circular dish with a small pocket at the bottom.
43.Farm animals have been regarded by nearly all societies as a valuable economic resource.
44.Although it is no longer the big business that it was in the forties, radio continues to be a medium of essential communication, especially at the local level.
45.The field of dynamics in physics is concerned with a particle''s motion in relation to the forces acting on.
46.In the United States, both the federal and state governments have laws designed to guard consumers against deceptive advertisement.
47.Gore Vidal has steadily pursued a literary career remarkable for its productivity, versatility, and unpredictability.
48.When overall exports exceed imports, a country is said to have a trade surplus.