Every year the U.S. exports almost ______% more agricultural goods than are imported
a. 30 c. 70
b. 50 d. 90
C
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____________________ were employed by the railroads to carry ties, rails, and supplies to the railheads, and to haul dirt and rock from the excavation of mountain tunnels.
Fill in the blank(s) with the appropriate word(s).
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Minerals are _____ materials needed in various amounts
a. organic c. trace b. inorganic d. major
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When DC voltages must have little or no ripple, a filter is used to smooth out the pulse.
Answer the following statement true (T) or false (F)
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Tolerance is the total permissible variation in a size or location dimension.
Answer the following statement true (T) or false (F)
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