The quest for sustainable sources of energy study the energy has led humans to study the energy pote...
Giải thích
D
Cụm từ “ this source” trong bài đọc ám chỉ đến.........................
Sun: mặt trời
Wind: gió
Rivers: sông
Oceans: đại dương
Dẫn chứng: The oceans, too, represent an impressive source of potential energy. For example, it has been estimated that the oceans could provide nearly 3,000 times the energy generated by hydroelectric dams such as the Hoover Dam. Yet, this source remains quite difficult to exploit.
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