Língua Inglesa - Vocabulário - Fundação para o Vestibular da Universidade Estadual Paulista (VUNESP) - 2013
The term over in Asphalt over concrete thats the standard. means that
both materials should be used together.
neither concrete nor asphalt meet the requirements.
both concrete and asphalt are good.
concrete is a harder material.
asphalt is the preferred one.
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