The satisfying "crack" which you get when you are eating crabs and lobsters could be silenced Shellfish have been struggling to build their calcium carbonate （碳酸鈣） shells which is a result of ocean acidification.（ ?。?/h1>
【考點】從屬連詞．
【答案】D
【解答】
【點評】
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發(fā)布：2024/4/20 14:35:0組卷：17引用：1難度：0.9
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