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问题描述：

[单选] （第1章）局域网具有的几种典型的拓扑结构中，一般不含（）。
A．星型 B．环型 C．总线型 D．全连接网型 E．------------------------
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上一篇：（第1章）若网络的各个节点通过中继器连接成一个闭合环路，则称这种拓扑结构称为（）。 下一篇：（第1章）传输距离在十公里以内，属于一个部门或一个单位组建的小范围网络是（）。

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您希望在一名67岁的患有COPD两年且未使用家庭氧气的患者中，通过室内空气获取以下哪些动脉血气结果？Which of the following arterial blood gas results， taken on room air， would you expect to see in a 67-year-old patient who has been suffering with COPD for two years and is not on home oxygen？
一名32岁的建筑工人在事故和紧急状态下处于窘迫状态。 他报告说在过去的两个星期内都遭受了胸痛，疼痛剧烈，只有在他移动重物时才会发生。 他有心血管疾病的家族病史，担心心脏病发作。 他的血气发现如下：pH = 7．47； PCO 2 = 3．3； PO2 = 15．3； 碳酸氢盐= 17．53。 最可能的诊断是：A 32-year-old builder presents in accident and emergency in a distressed state． He reports suffering from chest pain for the last 2 weeks， the pain is sharp and only occurs when he moves heavy objects． He has a family history of cardiovascular disease and is worried about a heart attack． His blood gas findings are as follows: pH = 7．47; PCO2 = 3．3; PO2 = 15．3; bicarbonate = 17．53． The most likely diagnosis is:
一名58岁的男子气喘吁吁。 他报告说在过去三个月中，由于恶心，呕吐和呼吸困难而感到不适。 您会发现他的脚踝肿胀，胳膊上有瘀伤。 病人说他没有像平常那样排尿。 最合适的调查是：A 58-year-old man presents with breathlessness; he reports feeling unwell over the last three months with nausea， vomiting and difficulty breathing． You notice his ankles are swollen and he has bruises on his arms． The patient mentions he has not been urinating as often as normal． The most appropriate investigation is:
一名60岁的糖尿病患者在瘫痪后从脓毒症中恢复过来，在进行血液培养和使用0．9％的生理盐水积极进行液体管理后，使用适当的抗生素治疗了2天，以降低血压。 尽管血压恢复正常，但患者的以下生化血液异常结果如下。 诊断是什么？A 60-year-old diabetic man recovering from sepsis after collapsing at home was treated with appropriate antibiotics after blood culture and aggressive fluid management with 0．9 per cent saline for 2 days for hypotension． Although blood pressure returned to normal， the patient had the following abnormal biochemical blood results is as follow． What is the diagnosis？pH 7．32PCO2 5．2PO2 11．1Sodium 147 mmol/LPotassium 3．5 mmol/LChloride 119 mmol/LBicarbonate 19．5
一个3周大的男孩被带到有1周强迫呕吐史的儿科医生办公室。 几乎每次喂奶后他都在呕吐。 呕吐物含有大部分未消化的配方，并且是非胆汁的。 检查时，他的口腔粘膜干燥，他的前font门似乎凹陷了，他的毛细血管补充时间为3-4秒。 腹部检查发现上腹部有2 cm肿块。 其余的考试没有什么变化。 以下哪种电解质发现最有可能出现？A 3-week-old boy is brought to the pediatrician"s office with a 1-week history of forceful vomiting． He has been vomiting after almost every feeding． The vomitus contains mostly undigested formula and is non-bilious． On examination， his oral mucosa is dry， his anterior fontanelle appears to be depressed， and his capillary refill is 3-4 seconds． Abdominal examination reveals a 2 cm mass in the epigastrium． The remainder of the examination is unremarkable． Which of the following electrolyte findings will most likely be seen？
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