天然气水合物又称可燃冰,是由水和天然气在高压、低温条件下混合而成的一种固态物质,外貌极像冰雪或固体酒精。下图为“我国南海可燃冰富集区示意图”。
读下图,回答下列各题。
①开采技术和成本要求高 ②运输困难,远离消费市场 ③容易对开采区造成环境污染 ④分布不集中
A.①② | B.③④ | C.①③ | D.②④ |
①促进我国能源消费结构多样化
②加大我国对传统能源的开采力度
③优化我国东部地区产业结构,延长煤炭生产链
④增加能源战略储备
A.①② | B.③④ | C.②③ | D.①④ |
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同类型试题
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y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
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y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
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