Nitrous oxides constitute approximately 50 percent of the pollutants in automobile exhaust
Indicate whether the statement is true or false.
F
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?Hobs are often made from oil-hardened tool steels containing a high percentage of____.
A. ?nickel B. ?aluminum C. ?chromium D. ?copper alloy
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A(n) ____________________ improves clamping force and acts as a return spring.
Fill in the blank(s) with the appropriate word(s).
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If a combination of white and black is added to a hue, the hue becomes grayed and is known as a ____
a. tint c. shade b. tone d. tertiary color
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Where in Europe did strong monarchies develop in the High Middle Ages?
a. England and Germany b. Italy and France c. France and England d. Germany and Italy
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