第23题: [单项选择]病人休克,血压低.脉搏130次/分,尿量20ml/h,选用哪种血管活性药物最适宜()。 A. 多巴胺 B. 去甲肾上腺素 C. 异丙肾上腺素 D. 肾上腺素 E. 苯肾上腺素(新福林) 参考答案:A 答案解析:肾上腺素、去甲肾上腺素既是α-受体兴奋剂,又是β-受体兴奋剂,兼有收缩全身血管,升压,增加心脏收缩力的作用;异丙肾上腺素为β-受体兴奋剂,可扩张血管增加心脏收缩力、心排血量和心率,易诱发心动过速,心率
Dear Mr. John Smith,
I’m sorry to inform you that we decide to raise the price of our products since the rise of raw material price. But we maintain the original price of our products you ordered. We hope you continue toorder our company’s products. A copy of our adjusted price list is enclosed.
Beg your pardon respectfully!