Nguồn than khai thác ở Trung du và miền núi Bắc Bộ được sử dụng chủ yếu cho
Đáp án đúng là: B. nhiệt điện và xuất khẩu.
Giải thích:
Than ở Trung du và miền núi Bắc Bộ chủ yếu là than antraxit, có nhiệt lượng cao, thích hợp cho nhiệt điện. Một phần than cũng được xuất khẩu để tăng nguồn thu.
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