?One of the first modified natural polymers was ____.
A. ?collodion
B. ?gutta percha
C. ?vulcanized rubber
D. ?celluloid
Answer: C
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An oblique sketch is completed by repeating the same lines shown on the original orthographic view at the starting points of the receding lines.
Answer the following statement true (T) or false (F)
A toucan's bill is both large and heavy
Indicate whether the statement is true or false
The household refrigerator fresh-food compartment is a good example of ____ refrigeration.
A. low-temperature B. medium-temperature C. high-temperature D. average-temperature
Why might wearing safety glasses with a shade of 11 create a hazardous situation?
A) Shade 11 glasses are not adequate for soldering. B) Smooth-toed leather shoes are not adequate for soldering. C) Shade 11 glasses may obscure vision while soldering. D) Smooth-toed leather shoes can trap sparks and debris.