200+ câu Trắc nghiệm Tiếng Anh chuyên ngành kỹ thuật điện có đáp án - Phần 7

Electronic power conditioning and control of the production and distribution of electricity .... important aspects of the smart grid.

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Electronic power conditioning and control of the production and distribution of electricity .... important aspects of the smart grid.

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were

Giải thích

Chọn đáp án A