单项选择题

Which of the following statements would best serve as an introduction to the passage

(A) It is easy to see why the confusion of skepticism with relativism, or of justification with truth, is rationally so debilitating.
(B) The presumption that genuine truth is possible without a measure of justification is a most mischievous error.
(C) If scientists would stop lauding scientific rationality in the face of reason, irrationalism would be less popular.
(D) Scientific hypotheses are not untrustworthy or unreliable except in the sense of being sometimes false.
(E) Faced with their detractors, scientists characteristically retort that science, unlike witchcraft, works.

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单项选择题

In the fourth paragraph, the author is primarily concerned with

(A) restating the main idea of the passage
(B) using research findings to make predictions
(C) outlining the direction of future research
(D) describing an additional aspect of a phenomenon
(E) introducing a conflicting hypothesis

单项选择题

It can be inferred from the passage that during yearly equinoxes, jet streams tend to

(A) move at velocities slower than those at which they move the summer but faster than those at which they move in the winter
(B) move from toward the east from the west in accordance with the deflection process caused by the Coriolis force
(C) move at velocities faster than those at which they move the summer but slower than those at which they move in the winter
(D) move at velocities equal to those of other planets that have similar polar temperature gradients
(E) move at velocities equal to that of the centrifugal motion that causes the deflection of the jetstream’s direction