Dr. Richard Watson, a cardiologist, confirmed today that the patient is still breathing______a respirator.

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问题 Dr. Richard Watson, a cardiologist, confirmed today that the patient is still breathing______a respirator.

选项 A、into
B、down
C、through
D、from

答案C

解析词汇：介词1．这是一道词汇题，选项均为介词。2．原文意思是“通过人工呼吸机”，介词through表示方式和手段，因此C选项through为正确选项。

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