Which of the following do forests provide for us?
a. clean water c. wood
b. oxygen d. all of the above
D
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The frost-free date in the spring in any locality is about the same time that the _____ tree has leaves out about 1 inch
A) cherry blossom B) oak C) maple D) American dogwood
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The process by which thermal energy is transferred by a gas is called __________.
A. convection B. conductance C. radiation
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Job-built forms for square or rectangular columns are built of plywood sheets and battens of _____
a. 2" × 8" lumber b. 2" × 6" lumber c. 2" × 4" lumber d. 2" × 2" lumber
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Which of the following means the same thing as equalizing-beam suspension?
A. torsion bar B. walking beam C. air spring D. multi-leaf variable rate
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