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一。环太平洋火山带的独特景色绝大多数是由频繁的地震造成的。
二。潮湿气候是他们开发岛屿上金属矿产的一大阻碍。
三。这个地点独特的气候特征是冬冷夏热。
四。哪些县的煤炭资源没有被充分地利用?
五。从古至今钢铁都被视作黄金。
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April 11, 2020
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