问题 单项选择题 A3/A4型题

患者,男性,12岁,无明显诱因出现头晕,卧床休息不能缓解,后出现昏迷,意识丧失,牙关紧闭,四肢抽动,口唇青紫,小便失禁,口吐白沫,此过程约4分钟。此后患者四肢松弛,逐渐清醒。清醒后患者感觉头痛,对抽搐的过程无记忆。

该患者所患病情属于()

A.癫痫强直-阵挛发作

B.癫痫持续状态

C.肌阵挛性发作

D.癫痫的单纯部分性发作

E.癫痫的复杂部分性发作

答案

参考答案:A

问答题

科学探究是奇妙的过程,请你一起参加实验探究,并填写下列空白:

(1)【提出问题】小松同学用“双氧水”(过氧化氢溶液)清洗伤口时,不小心将过氧化氢溶液滴到水泥地板上,发现有大量气泡产生.小松联想到自己曾经用二氧化锰作过氧化氢分解的催化剂,他想,水泥块能否做过氧化氢分解的催化剂呢?于是他到附近建筑工地取回一些小水泥块,并用蒸馏水浸泡、冲洗、干燥,并进行以下探究.

(2)【猜想】水泥块能做过氧化氢分解的催化剂吗?

(3)【实验验证】

实验步骤实验现象实验结论
实验一将______伸入装有过氧化氢溶液的试管中木条不复燃常温下过氧化氢溶液不分解
实验二在装有过氧化氢溶液的试管中加水泥块,然后将带火星的木条伸入试管中____________

______

(4)【结论】______.

(5)【讨论与反思】小芳认为:仅凭上述两个实验还不能证明水泥块能做过氧化氢分解的催化剂,她觉得需要一个探究实验:探究______.

【实验步骤】①准确称量水泥块的质量;②完成实验二;③待反应结束,将实验二试管里的物质进行过滤、洗涤、______、称量;④对比反应前后水泥块的质量.

【分析】如果水泥块在反应前后质量不变,则说明水泥块能做过氧化氢分解的催化剂.

(6)但小华认为,要证明小松的猜想,小芳的补充实验还是不够,还需要再补充一个探究实验:探究______.

单项选择题

Passage Two

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 of 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 has been presented with science as the production of gadgets; and for the person who views the scientists 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 independently 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 populated 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 a 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 contribution, 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 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 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 contribution to science