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【简答题】
由交感缩血管神经末梢释放的主要神经递质是（）|临床上常作为升压药使用的药物是（）|能减弱心肌收缩减慢心率的药物是（） A. 普萘洛尔 B. 去甲肾上腺素 C. 左旋多巴 D. 酚妥拉明 E. 肾上腺素
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【简答题】在防雷装置中用以接受雷云放电的金属导体称为消雷器。（）
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【简答题】在防雷装置中用以接受雷云放电的金属导体称为接闪器。()
【单选题】My name is Dora. I’m American and I’m thirteen. I’m a student in No. 7 Middle School. I like music very much. I can play two instruments — the guitar and the piano. I play them very well and I’m in th...
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D.
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