Описание презентации по отдельным слайдам:
Put the words in the proper blanks: electricity, quality, metal, shape The (1)___that is required from any material depends on its use: it's obvious that wires and springs can't be manufactured out of the same (2)___ as the former must possess ductility and the latter elasticity. Aluminium will certainly not do for a drill but is advisable for(3)___. Thus a designer must estimate the loads that a piece will carry and determine which material, (4)___and size is best suited.
COMPREHENSION : answer the questions - When choosing a material, what must a designer always think about ? -According to the text, which properties should wires possess ? What about springs ? -What can aluminium be used for ? -As a result, how does a designer choose a material ?
Номер материала: ДВ-014348
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