Вопрос из теста по предмету Английский язык

Question

Определите основную идею текста

Answer

Pure silicon is the most important semiconductor material.

Answer

Semiconductors with predictable, reliable electronic properties are necessary for mass production.

Answer

Modern material semiconductors are essential in the manufacture of various kinds of electronic devices.

Answer

If transistors weren’t invented, semiconductors would not be used in the modern device fabrication industry.

Определите основную идею текста: ответ на тест 804737 - Английский язык