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Science Education for a New Age The very great advances in science just before and after the midpoint of the twentieth century have caused education in the United States to realize that science teaching in the future must differ from :science teaching in the past.__ (1) The welfare, stability, and security of our nation are closely related to the discoveries of science and the application of these discoveries. ; Governors, lawyers and business leaders have to deal with scientists and every educated person has his views influenced by science.__ (2) 'I never did understand science.'Even those students who arrive at college with plans to become scientists usually bring a mistaken picture of science; some have a collection of unorganized facts about science; and some regard the study of science as a game that involves getting the right answer. If it were only necessary to decide whether to teach elementary sciehce to everyone on a mass basis or to find the gifted few and take them as far as they can go, our task would be fairly simple.__ (3) Because we depend so heavily upon science and technology for our existence and progress, we must produce specialists in many fields.__ (4) Science teaching must deal withthe knowledge and methods of science; both are necessary.From science courses students should acquire a useful command of science concepts and principles.Science is more than a collection of unrelated facts; to be meaningful and valuable, they must be arranged to show generalized concepts. (5) He must see that knowledge is subject to growth and change and that it is likely to shift in meaning and status with time. Young people need to understand how our society depends upon scientific and technological advancement and to realize that science is a basic part of modern living.The'scientific process and the knowledge produced cannot be considered to be ends in themselves,except for the classical scientist.A student should understand the relation of basic research to applied research, and the connection between technological developments and human affairs.
A.
The public school must educate both producers and users of scientific services.
B.
During the past twenty years science has played an important part in shaping the character of our civilization.
C.
Yet our science teaching of nonscientis’s in school and college has built up mistaken ideas, dislikes, and the common boast.
D.
The public school system, however, has no such choice, for the two jobs must be carried on at the same time.
E.
A student should learn something about the character of scientific knowledge, how it has been developed, and how it is used.
F.
Unfortunately, however, the science teaching in the'past failed to see the connection between the scientific advancement and human welfare. 第 46 题 请选择(1)处的最佳答案.
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【简答题】侧梁是转向架构架的主要承载梁,是传递 、 和横向力的主要构件,现代电力机车车体和车上部质量几乎都是通过旁承支承在构架侧梁上的。
【单选题】建筑物内的生活给水系统,当卫生器具给水配件处的静水压超过规定僮时,宜采 取( )措施。
A.
减压限流
B.
排气阀
C.
水泵多功能控制阀
D.
水锤吸纳器
【单选题】建筑物内的生活给水系统,当卫生器具给水配件处的静水压超过( )时,宜采取减压限流措施。
A.
350pA
B.
550pA
C.
450pA
D.
650pA
【单选题】电力机车构架的主要承载梁是( )。
A.
横梁
B.
端梁
C.
侧梁
D.
枕梁
【单选题】下图为一个陆地生态系统食物网的结构模式图,下列叙述中不正确的是 [     ]
A.
属于次级消费者的生物有丁、己、戊
B.
若发生重金属污染,则重金属积累最多的生物是庚
C.
有5条食物链,与丁竞争最为激烈的是丙
D.
若戊的种群数量增加,则庚的种群数量不一定增加,丁的种群数量将减少
【单选题】电力机车构架的主要承载粱是().
A.
横梁
B.
端粱
C.
侧梁
D.
枕梁
【单选题】下列不属于陆地生态系统特点的是
A.
温度变化大
B.
生态因素不均匀分布
C.
土壤和大气直接接触
D.
植被多
【单选题】下图是一个陆地生态系统食物网的结构模式图。下列叙述中,正确的是 [     ]
A.
在该食物网中,C和E是竞争关系
B.
在该食物网中,G只属于三级消费者
C.
H在食物链“A→C→D→H”中获得的能量最多
D.
如果C种群的数量下降10%,则H种群的数量不会发生明显变化
【单选题】电力机车构架的主要承载梁是( )。
A.
横梁
B.
端梁
C.
侧粱
D.
枕梁
【单选题】对于建筑物内的生活给水系统,当卫生器具给水配件处的静水压超过规定值时,应采取的措施为( )。
A.
加压
B.
重新校核
C.
减压限流
D.
只需减压,不必限流
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