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【单选题】
某有机物X(C 13 H 13 O 7 Br)遇到FeCl 3 溶液显紫色,其部分结构如下: 已知:①X在足量的氢氧化钠水溶液中加热,可以得到
A.
B.
C三种有机物; ②室温下B经盐酸酸化可以得到苹果酸D,D的分子式为C 4 H 6 O 5 ; ③C能发生反应. 试回答: (1)D中所含官能团的名称是______,D不能发生的反应类型是______(填序号). ①加成反应,②消去反应,③氧化反应,④酯化反应. (2)D的一种同分异构体E有如下特点:1molE可以和3mol金属钠发生反应,放出33.6L H 2 (标准状况下),1mol E可以和足量NaHCO 3 溶液反应,生成1mol CO 2 ,1mol E还可以发生反应,生成2mol Ag.试写出E可能的结构______. (3)A和D在一定条件下可以生成八酯,写出此反应的化学方程式______. (4)若C经盐酸酸化后得到的有机物F,其苯环上的一溴代物只有两种,则F可能的结构为______,写出其中任意一种和银氨溶液发生反应的化学方程式______. (5)F的一种同分异构体是制取阿司匹林( )的原料,试写出其结构______,它在一定条件下生成高分子化合物的方程式为______.
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【单选题】女性,76岁。慢性咳嗽、咳痰病史20余年,1周前受凉后症状加重伴明显气短入院。血气分析示:pH7.32,PaCO 2 75mmHg,PaO 2 45mmHg。该患者吸氧时氧浓度应控制在()
A.
20%~25%
B.
25%~30%
C.
30%~40%
D.
40%~50%
E.
50%以上
【单选题】焦糖化作用是指(    )在无氨基化合物存在的情况下,加热到熔点以上,会生成有色物质。
A.
蔗糖    
B.
葡萄糖    
C.
果糖    
D.
淀粉
【单选题】Boll, a German scientist who was the star of the Manhattan Project, is lecturing at a New York university on the 50th anniversary of the dropping of the atomic bomb on Japan. The speech has become par...
A.
has been enjoying the victory over the Japanese
B.
is a professor at the State University of New York
C.
was one of the scientists who made atomic bombs
D.
has made himself certain he had done nothing wrong
【单选题】老年女性,75岁。慢性支气管炎病史30余年,近1周感冒后咳嗽、气促,咳痰量明显增加,并出现明显颜面、双下肢肿。患者考虑诊断有()
A.
慢支急性发作并发肾功能不全
B.
慢支急性发作并发左心衰竭
C.
慢支急性发作并发右心衰竭
D.
慢支急性发作并发全心衰竭
E.
慢支急性发作并发电解质紊乱
【单选题】Boll, a German scientist who was the star of the Manhattan Project, is lecturing at a New York university on the 50th anniversary of the dropping of the atomic bomb on Japan. The speech has become par...
A.
has been enjoying the victory over the Japanese
B.
is a professor at the State University of New York
C.
was one of the scientists who made atomic bombs
D.
has made himself certain he had done nothing wrong
【单选题】患者,女,75岁,慢性咳嗽、咳痰30年,活动后气急10年,加重1周伴嗜睡2天入院,血白细胞20×109/L,中性粒细胞88%。血气分析示:pH7.28,PaO250mmHg,
A.
CO280mmHg。该病最可能的诊断是:
B.
Ⅰ型呼吸衰竭
C.
Ⅱ型呼吸衰竭
D.
急性呼吸窘迫综合征
E.
脑血管意外
F.
支气管哮喘急性发作
【单选题】患者,女,75岁,慢性咳嗽、咳痰30年,活动后气急10年,加重1周伴嗜睡2天入院,血白细胞20×109/L,中性粒细胞88%。血气分析示:pH7.28,PaO250mmHg,
A.
CO280mmHg。此时恰当的处理是:
B.
立即停用呼吸机
C.
胸腔穿刺抽液
D.
大剂量抗生素
E.
大剂量利尿剂
F.
胸腔闭式引流
【单选题】患者,女,75岁,慢性咳嗽、咳痰30年,活动后气急10年,加重1周伴嗜睡2天入院,血白细胞20×109/L,中性粒细胞88%。血气分析示:pH7.28,PaO250mmHg,
A.
CO280mmHg。经抢救病情好转,但在机械通气过程中,突然氧饱和度下降,气道压增高。查体:左肺叩诊鼓音,左肺呼吸音消失,考虑并发症是:
B.
左侧胸腔积液
C.
气道阻塞
D.
左侧气胸
E.
急性左心功能不全
F.
肺不张
【判断题】选言命题是断定几个可能的事物情况中至少有一个事物情况存在的命题。()
A.
正确
B.
错误
【单选题】Boll, a German scientist who was the star of the Manhattan Project, is lecturing at a New York university on the 50th anniversary of the dropping of the atomic bomb on Japan. The speech has become par...
A.
has been enjoying the victory over the Japanese
B.
is a professor at the State University of New York
C.
was one of the scientists who made atomic bombs
D.
has made himself certain he had done nothing wrong
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