The best title for this passage is______. [br] The description of the structure

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问题 The best title for this passage is______. [br] The description of the structure of the nodules is reminiscent(使人想起) of the method used to

选项 A、manufacture synthetic diamonds
B、create cultured pearls
C、reverse the electrochemical process
D、pan gold

答案 B

解析根据文章倒数第二段可以看出，鹅卵石、鲨鱼的牙齿以及鲸的耳骨在矿砂里运动，就像养殖珍珠一样需要在蚌里运动，所以B为正确答案。

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