Staining of plumbing fixtures may be caused by iron concentrations as low as _____.
a. 0.03 ppm
b. 0.3 ppm
c. 3 ppm
d. 30 ppm
b. 0.3 ppm
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a. smartphone b. analog meter c. tablet computer d. liquid crystal display
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What is a working drawing?
What will be an ideal response?
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Historically, farmers have treated natural resources as being limited
Indicate whether the statement is true or false
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What is a saturation pressure-temperature chart?
What will be an ideal response?
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