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【題目】樹產生的這種化學物質保護他們免受昆蟲侵害。

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【答案】The chemical produced by trees protects them from insects.

【解析】

根據句意可知時態(tài)是一般現在時。the chemical produced by trees樹產生的化學物質,過去分詞作后置定語;protect…from…保護……免受……侵害;insects昆蟲。本句是一般現在時,the chemical作主語,謂語動詞用第三人稱單數形式protects。故答案為The chemical produced by trees protects them from insects.

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