What is the proper depth of a planting hole?
A. just deep enough to cover the bottom of the root ball so the roots get enough air
B. deep enough to cover the crown by several inches so the plant does not fall over
C. planting depth does not matter as long as the plant rests on undisturbed ground
D. deep enough to cover the rootball but not the crown
Answer: D
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In his second term, President Reagan departed from the militantly anti-Soviet stance of his first term by
A. joining with Soviet leader Gorbachev to end Soviet-American political and military conflicts in the Third World. B. supporting Russia if it would let go of the territories held in its Soviet empire. C. agreeing that the Soviet Union had a legitimate sphere of interest in Eastern Europe. D. making the Soviet Union a major trading partner of the United States. E. negotiating and signing nuclear arms reduction agreements with the new Soviet leader Mikhail Gorbachev.
Label the following furnace
What did early commercial and industrial control systems use to maintain the temperature in a structure, zone, or room?
What will be an ideal response?
Questions 67 through 69 deal with the circuit below, where X and Y are digital signals:
If X=0 and Y=1, the LED will be
A. ON B. OFF