Современные проблемы промышленного и гражданского строительства на занятиях английского языка. Кузьмина Е.В. - 9 стр.

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3. Look at these examples:

A man can easily lift a large roll of glass wool but not a concrete beam

Glass wool is light but concrete is heavy.

A man can bend a rubber tile but not a concrete tile.

Rubber is flexible but concrete is rigid.

Wood is combustible but concrete is non-combustible.

Water vapor can pass through stone but not through bitumen.

Stone is permeable but bitumen is impermeable.

You can see through glass but not through wood.

Glass is transparent but wood is opaque.

Stainless steel can resist corrosion but mild steel cannot.

Stainless steel is corrosion resistant but mild steel is not corrosion resistant.

Heat can be easily transferred through copper but not through wood.

Copper is a good conductor of heat but wood is a poor conductor of heat.

Rubber can be stretched or compressed and will then return to its original shape

but clay cannot.

Rubber is elastic but clay is plastic.

Bitumen can be dented or scratched easily but glass cannot.

Bitumen is soft but glass is hard.

Now complete these sentences with properties:

a) The polythene membrane can prevent moisture from rising into the concrete

floor. This means that polythene is ____________.

b) The T-shaped aluminium section can resist chemical action, i.e. aluminium

____________.

c) The stone block cannot be lifted without using a crane. This means that

stone is ____________.

d) The corrugated iron roof cannot prevent the sun from heating up the house,

i.e. iron is ____________.

e) Glass wool can help to keep a house warm in the winter and cool in the

summer, i.e. glass wool is ____________.