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【单选题】

Passage Two
Children live in a world in which science has tremendous importance. During their lifetimes it will affect them more and more. In time, many of them will work at jobs that depend heavily on science--for example, concerning energy sources, pollution control, highway safety, wilderness conservation, and population growth. As taxpayers they will pay for scientific research and exploration. And, as consumers, they will be bombarded (受到轰击) by advertising, much of which is said to be based on science.
Therefore, it is important that children, the citizens of the future, become functionally acquainted with science--with the process and spirit of science, as well as with its facts and principles. Fortunately, science has a natural appeal for youngsters. They can relate it to so many things that they encounter--flashlights, tools, echoes, and rainbows.
Besides; science is an excellent medium for teaching far more than content. It can help pupils learn to think logically, to organize and yse ideas. It can provide practice in communication skills and mathematics. In fact, there is no area of the curriculum to which science cannot contribute, whether it is geography, history, language arts, music, or art!
Above all, good science teaching leads to what might be called a "scientific attitude". Those who possess it seek answers through observing, experimenting, and reasoning, rather than blindly accepting the pronouncements of others. They weigh evidence carefully and reach conclusions with caution. While respecting the opinions of others, they expect honesty, accuracy, and objectivity and are on guard against hasty judgments and sweeping generalizations. All children should be developing this approach to solving problems, but it cannot be expected to appear automatically with the mere acquisition of information. Continual practice, through guided participation, is needed.
People with a scientific attitude ______

A.
are ready to accept the pronouncements of others
B.
tend to reach conclusions with certainty
C.
are aware that others are likely to make hasty judgments
D.
seek truth through observation, experimentation and reasoning
题目标签:轰击
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参考答案:
举一反三

【单选题】X线管内电子轰击的面积称()。

A.
小焦点
B.
大焦点
C.
双焦点
D.
有效焦点
E.
实际焦点

【单选题】快原子轰击质谱为

A.
FD-MS
B.
EI-MS
C.
FAB-MS
D.
LSI-MS
E.
ESI-MS

【单选题】X线管内电子轰击阳极的面积称为:

A.
小焦点
B.
大焦点
C.
双焦点
D.
有效焦点
E.
实际焦点

【多选题】电子轰击离子源的缺点有()。

A.
化学键较弱的化合物分子离子检测不到
B.
分子量测定困难
C.
轰击电子速度较快
D.
灵敏度较低

【单选题】X线管内电子轰击的面积称( )

A.
大焦点
B.
小焦点
C.
有效焦点
D.
双焦点
E.
实际焦点
相关题目:
【单选题】X线管内电子轰击的面积称()。
A.
小焦点
B.
大焦点
C.
双焦点
D.
有效焦点
E.
实际焦点
【单选题】快原子轰击质谱为
A.
FD-MS
B.
EI-MS
C.
FAB-MS
D.
LSI-MS
E.
ESI-MS
【单选题】X线管内电子轰击阳极的面积称为:
A.
小焦点
B.
大焦点
C.
双焦点
D.
有效焦点
E.
实际焦点
【多选题】电子轰击离子源的缺点有()。
A.
化学键较弱的化合物分子离子检测不到
B.
分子量测定困难
C.
轰击电子速度较快
D.
灵敏度较低
【单选题】X线管内电子轰击的面积称( )
A.
大焦点
B.
小焦点
C.
有效焦点
D.
双焦点
E.
实际焦点
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