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600 Bài tập trắc nghiệm Tiếng Anh 12 mới

For how long was the Newcomen machine used?


Câu hỏi:

For how long was the Newcomen machine used?

Trả lời:

It remained in use for more than 50 years

Giải thích:

Dẫn chứng “The Newcomen engine remained in use for more than 50 years but they turned out to be inefficient as a lot of energy was required for the engine to run effectively.

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