The word science is heard so often in
modern times that almost everybody has some notion of its meaning. On the other
hand, its definition is difficult for many people. The meaning of the term is
confused, but everyone should understand its meaning and objectives. Just to
make the explanation as simple as possible, suppose science is defined as
classified knowledge (facts).
Even in the true sciences
distinguishing fact from fiction is not always easy. For this reason great care
should be taken to distinguish between beliefs and truths. There is no danger as
long as a clear difference is made between temporary and proved explanations.
For example, hypotheses and theories are attempts to explain natural phenomena.
From these positions the scientist continues to experiment and observe until
they are proved or discredited. The exa
A. the study of unrelated subjects
B. an attempt to explain natural phenomena
C. the study of unrelated fields
D. classified knowledge
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[单项选择] Passage Three
The word science is heard so often in
modern times that almost everybody has some notion of its meaning. On the other
hand, its definition is difficult for many people. The meaning of the term is
confused, but everyone should understand its meaning and objectives. Just to
make the explanation as simple as possible, suppose science is defined as
classified knowledge (facts).
Even in the true sciences
distinguishing fact from fiction is not always easy. For this reason great care
should be taken to distinguish between beliefs and truths. There is no danger as
long as a clear difference is made between temporary and proved explanations.
For example, hypotheses and theories are attempts to explain natural phenomena.
From these positions the scientist continues to experiment and observe until
they are proved or discredited. The exa
A. may lead to antiscientific, "impure" results
B. necessarily precedes applied science, leading to the discovery of a cell
C. is not always as pure as we suppose
D. necessarily results from applied science and the discovery of a cell
[单项选择] Passage 3
The word science is heard so often in
modern times that almost everybody has some notion of its meaning. On the other
hand, its definition is difficult for many people. The meaning of the term is
confused, but everyone should understand its meaning and objectives. Just to
make the explanation as simple as possible, suppose science is defined as
classified knowledge (facts).
Even in the true sciences
distinguishing fact from fiction is not always easy. For this reason great care
should be taken to distinguish between beliefs and truths. There is no danger as
long as a clear difference is made between temporary and proved explanations.
For example, hypotheses and theories are attempts to explain natural phenomena.
From these positions the scientist continues to experiment and observe until
they are proved or discredited. The exact s
A. the study of unrelated subjects
B. an attempt to explain natural phenomena
C. the study of unrelated fields
D. classified knowledge
[单项选择] Passage Three
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 has been presented with
science as the production of gadgets; and for the person who views the
scientists as some sort of magician.
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
[单项选择] Passage Three
Three years ago, researchers announced the discovery
of human genes that were capable of turning ordinary cells into malignant ones.
The news met with some skepticism. Experts asked how a single gene could cause
such a dramatic change. Why does cancer take years or even decades to develop if
it is caused by such a simple and direct process In last week’s issue of the,
three research teams answered those questions by setting forth a new model for
understanding the role of oncogenes in cancer.
Each group found
that it does in fact take more than a single gene to produce cancer in normal
cells. Teams at M. I. T and Cold Spring Harbor Laboratory on Long Island, N. Y.
, reported that they could induce cancer in normal rat cells only by inserting
at least two types of oncogene into the cells. "A single oncogene produced some
changes,
A. was caused by normal cells
B. sometimes resulted from internal actions of the victim’s own body
C. was a hereditary disease
D. was a form of malignancy
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