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问题 单项选择题

患者女性，26岁，感冒后第8天出现心悸、胸痛、气促、颈静脉怒张．心率120次／分，心尖区第一心音减弱，有奔马律，有心尖区收缩期吹风样杂音2级，对确诊最有意义的检查是（）

A.胸片

B.心电图

C.血沉

D.血清病毒中和抗体

E.超声心动图

答案

参考答案：D

单项选择题

Quality and grade are not the same. A fundamental distinction is that ______ .

A) grade is a category assigned to products or services having the same functional use. but different technical characteristics
B) low quality may not be a problem; low grade is always a problem
C) determining and delivering the required levels of quality are not included in the responsibilities of the project manager and the project team
D) determining and delivering the required levels of grade are not included in the responsibilities of die project manager and the project team
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选择题

元稹诗云：“求珠驾沧海，采玉上荆衡；北买党项马，西擒吐蕃鹦；炎州布火浣，蜀地锦织成；婢脂肉滑，奚童眉眼明；通算衣食费，不计远近程，经游天下遍，却到长安城。”此诗主要反映

A．西汉商业贸易发展盛况

B．区域性商人群体的兴起

C．唐代各地经济联系加强

D．唐朝百姓生活富裕安康
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