题目内容

I realized that by not hanging up the phone I _______ another eight minutes a day.

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I'm certain that I could be of some _____ to you.

I'm Chris Gardner. I have an ______ with Mr. Ribbon.

川乌为科植物,乌头的干燥(用药部位)。

以下心电图波段中,由心室除极产生的是

A. P波
B. QRS波
C. S-T段
D. T波
E. U波

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