Building Materials
Veneering means

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

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Building Materials
In the method of condensation polymerization,

The reaction proceeds with an evolution of hydrogen chloride
All of these
The reaction proceeds with an evolution of ammonia
Low-molecular substances are removed from the high molecular substance

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