2. 外语
  3. As a defense against air-pollution damage, many plants and animals ______ a substance to absorb harmful chemicals.

As a defense against air-pollution damage, many plants and animals ______ a substance to absorb harmful chemicals.

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问题 As a defense against air-pollution damage, many plants and animals ______ a substance to absorb harmful chemicals.
选项 A、relieve
B、release
C、dismiss
D、discard
答案B
解析 release vt.释放(囚犯、热、能量等)；发布(消息)；放开，松开(release a prisoner；release energy：release the brake：release news to the public：release sb．from his obligations)。relieve vt．减轻，解除；救济。dismiss vt．解散，遣散；免职，解雇，开除：(认为不重要而)不再考虑。discard vt．丢弃，抛弃。
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