Given this table of plant residue analyses, choose the "highest quality" residue in terms of suitability to support an active community of soil organisms and rapid nutrient cycling
A B C D E
C/N ratio 15 15 15 45 45
Polyphenol content,% 0.5 6.0 6.0 0.5 0.5
Lignin content,% 10 40 10 40 10
A) residue A B) residue B C) residue C D) residue D E) residue E
A
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A. ?epoxy B. ?polyester resin C. ?acrylic D. ?polyurethane
The ability to transform AC to a higher or lower __________ using a transformer is a significant advantage of AC.
Fill in the blank(s) with the appropriate word(s).
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A) grasses B) legumes C) coniferous trees D) broad leaf trees E) all of the above
Installing a filter with a high pressure drop can
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