The valence shell of an atom is the _____ shell.
A. inner
B. outer
C. middle
D. bottom
Answer: B
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____ is a cancer-causing, natural radioactive gas that permeates the ground.
A. Exhaust B. Carbon monoxide C. Radon D. Hydrogen
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____ welding is accomplished by using roller-type electrodes.
A. Seam B. Ultrasonic C. Flash D. Upset
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In the diagram the arrow indicates ______.
A. parts to be welded B. welding process C. reference line D. type and location of weld
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Peripherals include
A) external drives. B) monitors. C) keyboards. D) all of the above.
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