The process of respiration consists of two independent actions:inhaling and exhaling.

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问题 The process of respiration consists of two independent actions:inhaling and exhaling.

选项 A、speaking
B、reciting
C、smelling
D、breathing

答案D

解析 speaking意为“说话”;reciting意为“背诵,朗读”;smelling意为“闻,嗅”;breathing意为“呼吸”。根据句子的意思respiration过程包括两个独立的动作,吸气和呼气”可知,正确答案为D。
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