对诊断室上性阵发性心动过速最有意义的是()A.心率常在180次/分以上 B.心律绝对

题型:单项选择题 A1型题

问题:

对诊断室上性阵发性心动过速最有意义的是()

A.心率常在180次/分以上

B.心律绝对规则

C.颈动脉按摩能增加房室传导阻滞

D.颈动脉按摩能使心率突然减慢

E.颈动脉按摩时心率逐渐减慢,停止后心率复原

考点:中西医结合执业医师第二单元循环系统疾病第二单元循环系统疾病题库
题型:单项选择题 A1型题

B


Science is a dominant theme in our culture. Since it touches almost every facet of our life, educated people need at least some acquaintance with its structure and operation. They should also have an understanding of the subculture in which scientists live and the kinds of people they are. An understanding of general characteristics of science as well as specific scientific concepts is easier to attain if one knows something about the things that excite and frustrate the scientist.
This book is written for the intelligent student or lay person whose acquaintance with science is superficial; for the person who has been presented with science as a musty storehouse of dried facts; for the person who sees the chief objective of science as the production of gadgets; and for the person who views the scientist as some sort of magician. The book can be used to supplement a course in any science, to accompany any course that attempts to give an understanding of the modern world, or independent of any course -- simply to provide a better understanding of science. We hope this book will lead readers to a broader perspective on scientific attitudes and a more realistic view of what science is, who scientists are, and what they do. It will give them an awareness and understanding of the relationship between science and our culture and an appreciation of the roles science may play in our culture. In addition, readers may learn to appreciate the relationship between scientific views and some of the values and philosophies that are pervasive in our culture.
We have tried to present in this book an accurate and up-to-date picture of the scientific community and the people who populate it. That population has in recent years come to comprise more and more women. This increasing role of women in the scientific subculture is not an unique incident but, rather, part of the trend evident in all segments of society as more women enter traditionally male-dominated fields and make significant contributions. In discussing these changes and contributions, however, we are faced with a language that is implicitly sexist, one that uses male nouns or pronouns in referring to unspecified individuals. To offset this built-in bias, we have adopted the policy of using plural nouns and pronouns whenever possible and, when absolutely necessary, alternating he and she. This policy is far from being ideal, but it is at least an acknowledgment of the inadequacy of our language in treating half of the human race equally.
We have also tried to make the book entertaining as well as informative. Our approach is usually informal. We feel, as do many other scientists, that we shouldn’t take ourselves too seriously. As the reader may observe, we see science as a delightful pastime rather than as a grim and dreary way to earn a living.

According to the passage, "scientific subculture" means ______.

A.cultural groups that are formed by scientists

B.people whose knowledge of science is very limited

C.the scientific community

D.people who make good contributions to science

题型:单项选择题 A1型题

高血压性脑出血的主要机理是()

A.脑内动脉外膜不发达,管壁较薄,易致破裂

B.动脉硬化内膜粗糙,形成内膜溃疡,在高血压作用下而血管破裂

C.在高血压基础上,合并脑内动静脉畸形,故易出血

D.高血压可使小动脉硬化,玻璃样变,形成微动脉瘤导致破裂

E.实质上是脑内静脉循环障碍和静脉破裂

题型:单项选择题 A1型题

男,59岁。因慢性心功能不全服用地高辛,现觉心悸、心慌、恶心、呕吐,视物出现黄绿色光影,心电图示频发室性期前收缩,考虑为洋地黄中毒。宜选的药物是

A.苯妥英钠

B.奎尼丁

C.美托洛尔

D.胺碘酮

E.普鲁卡因胺

题型:单项选择题 A1型题

在微程序控制器中,何谓微命令微命令与微操作的关系是什么

题型:单项选择题 A1型题

国务院 * * 温 * * 在回答记者提问时说,在涉及中国主权和领土完整的重大问题上,即使是中国很穷的时候,我们也是铮铮铁骨。我国之所以高度重视主权和领土完整,是因为( )

①主权和领土完整是构成国家的基本要素

②主权和领土完整是中 * * 的最高利益

③主权是一个国家的生命和灵魂

④我国是人民民主专政的社会主义国家

A.①②③

B.①②④

C.②③④

D.①③④

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