2. 外语
  3. Molds cannot produce their own food ______ their nourishment from living on dead organic matter or on other living matter.

Molds cannot produce their own food ______ their nourishment from living on dead organic matter or on other living matter.

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问题 Molds cannot produce their own food ______ their nourishment from living on dead organic matter or on other living matter.
选项 A、obtain
B、obtaining
C、but obtain
D、is obtained
答案C
解析 根据英语的not...but...并列结构原则，正确答案是C。
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