直角尺是用来检查或测量工件内外角度的。()

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问题:

直角尺是用来检查或测量工件内外角度的。()

考点:信号工考试信号修配信号修配题库
题型:判断题

简述建筑物区分所有权的概念与特征。

题型:判断题

(1)根据打点计时器所打的纸带,我们可以不利用公式就能直接得到的物理量是______

A.时间间隔 B.位移 C.加速度 D.平均速度

(2)用打点计时器研究物体的自由落体运动,得到如图所示的一段纸带,测得AB=7.65cm,BC=9.17cm.已知交变电流频率是50Hz,则打B点时物体的瞬时速度为______m/s.物体下落的加速度g=______m/s2.如果实验测出的重力加速度值比公认值偏小,可能原因是______.

题型:判断题

消防技术标准根据强制约束力的不同,分为强制性标准和推荐性标准两大类。

题型:判断题

下面三幅图中,甲图为我国南方低山丘陵地区M地附近地区的平面图,乙图和丙图分别为过甲图相应的点所作的地形剖面图。据图完成各题。

在一次较大的降水过程中,降落在a地的水体在坡面上的流向是()

A.自北向南

B.自东向西

C.自西北向东南

D.自西向东

题型:判断题

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 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 work, 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 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 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 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.

We need to know something about the structure and operation of science because ______.

A. it is not easy to understand the things that excite and frustrate the scientist
B. Science affects almost every aspect of our life
C. Scientists live in a specific subculture
D. It is easier to understand general characteristics of science

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