1.
The gray scale, a progressive series of shades ranging from black to white, is used in computer graphics ---- detail to graphical images.
2.
By ---- excluding competition from an industry, governments have often created public service monopolies.
3.
---- skeleton of an insect is on the outside of its body.
4.
Lenses, ---- are used to correct imperfections in eyesight.
5.
In eighteenth-century North America, printed engravings provided ---- of rococo style.
6.
In the Arctic tundra, ice fog may form under clear skies in winter, ---- coastal fogs or low status clouds are common in summer.
7.
On attaining maximum size, ---- by drawing itself out and dividing into two daughter amoebas, each receiving identical nuclear materials.
8.
For the advertiser, one of the greatest appeals of radio is --- an audience all day long.
9.
Charles Schulz’s comic strip, “Peanuts,” features children who make --- about life.
10.
One of the major rivers of the western United States, ---- flows for some 1,500 miles from Colorado to northwestern Mexico.
11.
In art, the tendency of gouache colors to lighten on drying makes ---- a wide range of pearly or pastel-like effects.
12.
Isabel Bishop was one of many American artists ---- by the government during the Depression years on various federal art projects.
13.
Outbreaks of diseases in trees commonly occur ---- stressed because of drought or other environmental factors.
14.
To break thick ice, an icebreaker boat moves fast enough to ride up on the ice, ---- under its weight.
15.
Cholesterol is present in large quantities in the nervous system, where ---- compound of myelin.
