Building Materials
Proper amount of entrained air in concrete results in (i) Better workability (ii) Better resistance to freezing and thawing (iii) Lesser workability (iv) Less resistance to freezing and thawing

(iii) and (iv)
(i) and (ii)
(ii) and (iii)
(i) and (iv)

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Building Materials
Veneering means

Carving out designs on timber planks
Thick layer of superior wood glued to inferior wood
Chemically treating timber planks
Thin layer of superior wood glued to inferior wood

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