[单项选择]The discoveries of science often are a mixed blessing. On the one hand they give us valuable pesticides that enable the farmer to grow more abundant crops and on the other hand they the benefits by destroying the balance of nature.
A. compromise
B. misplace
C. damage
D. counterract

[单项选择]The discoveries of science often are a mixed blessing. On the one hand they give us valuable pesticides that enable the farmer to grow more abundant crops and on the other hand they ______ the benefits by destroying the balance of nature.
A. compromise
B. misplace
C. damage
D. counterract

[单项选择]Advance in science more often than not encounters powerful opposition, ______Darvin’s Theory of Evolution.
A. as was the case with
B. such as the case of
C. as it did with
D. as in the case of

[单项选择]Though science is often imagined as a disinterested subject, scientists are no different from anyone else: they are ______ human beings enmeshed (陷入:卷入) in a web of personal and social circumstances.
A. vulnerable
B. rational
C. careless
D. passionate

[单项选择]Science at the present time is often applied to ______.
A. boost production of grain
B. construct first-rate transportation system
C. turn out sophisticated weapons used for mass killing in war
D. turn desert into fertile land

[单项选择]Announcements of discoveries in professional journals always qualify and quantify their______; announcements in the general media often do not, because usually lack the background to interpret them.
A. (A) sources… critics
B. (B) certainty… laymen
C. (C) shortcomings … experts
D. (D) jargon… readers
E. (E) theory… specialists

[单项选择]Many important scientific discoveries are in fact _________ones as they were made by chance.
A. relative
B. temporary
C. subordinate
D. accidental

[单项选择]To what extent will future scientific discoveries make possible the ______ of human life span
A. increase
B. expansion
C. growth
D. prolongation

[单项选择]Which of the following discoveries would likely have an effect upon the views of scientists similar to that of the explosion of El Chico

[单项选择]What type of scientific discoveries does the woman mainly talk about


A. Archaeological.
B. Biological.
C. Meteorological.
D. Sociological.

[单项选择]Which of the following hypothetical discoveries, if made, would be most likely to reduce the technical difficulties in producing plastic from organic crops
A. (A) a source of refining fossil fuels that significantly reduces their cost to plastic manufacturers
B. (B) a way of maintaining grain yields while producing high quantities of plastic that do not interfere with the functioning of plant chloroplasts
C. (C) a means of reducing the clean-up cost of environmental damage wrought by CO₂ and SO₂ emissions
D. (D) a means of yielding greater efficiency from coal-based fuels used in the organic plastic-production process
E. (E) the discovery of a renewable source of plant-sugar that would lessen reliance on fossil fuels in organic plastic-manufacture

[单项选择]Recent discoveries in Montana indicate that some dinosaurs may have {{U}}resided{{/U}} in colonies.
A. lived
B. died
C. hunted
D. fed