130
c) replace the words in italics with the words with similar meanings:
1.
Materials science includes
different
classes of materials. 2.
Materials
science
embraces
the traditional classes of engineering materials: metallic and
non-metallic materials. 3. Clay was used
to manufacture
ceramics. 4. There
are a lot of alloys containing copper,
for example,
brass, bronze, etc. 5.
Ancient
people
had an access to a very limited number of natural materials.
Exercise 15. Complete the sentences: change the word in capitals at the end of
each sentence to form a word that fits suitably in the blank space.
1. … steels which contain nickel do not rust STAIN.
2. Materials were very important in the … of societies DEVELOP.
3. Carbon increases … in cast iron BRITTLE.
4. There are … kinds of engineering materials DIFFER.
5. Corrosion … is one of the aluminium properties RESIST.
Exercise 16. Insert the words at the sentence level: fill in the blanks with the
missing words (the first letter of each word is given).
1. A lot of materials with specialized p… have been developed. 2. Metallic
materials which contain iron are called f… metals. 3. Steels which contain t…
are extremely hard. 4. Copper is a m… metal. 5. Copper is a f… element of vari-
ous alloys. 6. R… is a natural polymer. 7. T… can be moulded numerous times.
8. The plastics properties are i… . 8. Ceramics are strong and s… . 9. Materials
science e… different groups of materials. 10. Metallic materials include metals
and a… .
Достарыңызбен бөлісу: 
