Câu 1: Đảo nào sau đây không được xếp vào các đảo đông dân của vùng biển nước ta? * A. Cồn Cỏ. B. Lý Sơn. C. Cát Bà. D. Cái Bầu. Câu 2: Đâu không phải là nguyên nhân dẫn đến giảm sút tài nguyên biển – đảo ? * A. Sử dụng các phương thức có tính huỷ diệt (nổ mìn, rà điện,...). B. Khai thác bừa bãi, quá mức tài nguyên thủy sản. C. Đánh bắt cá bằng lưới dày. D. Tăng cường đánh bắt xa bờ. Câu 3: Đối với môi trường biển, loại ô nhiễm nào là nguy hiểm nhất? * A. Rác thải sinh hoạt. B. Rác công nghiệp. C. Túi nilong. D. Ô nhiễm dầu mỏ.

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