单项选择题

The author uses the example of the question of life in other galaxies primarily in order to

(A) question whether in certain situations the truth may ever be determined
(B) illustrate that truth has an objective existence even when there are few empirical grounds for determining it
(C) suggest that the answer to certain scientific questions plays only a minor role in people’s lives
(D) support the thesis that skepticism plays a vital role in the scientific process
(E) assess the answers pseudo-sciences like ufology provide for unanswerable questions

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单项选择题

It can be inferred from the passage that the Cepheid variable method of estimating galactic distances would be likely to yield experimentally flawed results in which of the following circumstances

(A) If the luminosity of ordinary stars being compared with that of a Cepheid star were affected by parallax.
(B) If the apparent brightness of the Cepheid star being studied required an unusually long period of time to vary.
(C) If the gravitational interference surrounding the Cepheid star being observed were more negligible than in most cases.
(D) If the Cepheid star being studied existed on the periphery of the universe, at an extremely large distance from the observer.
(E) If the Cepheid star being studied were in the same galaxy as the observer.

单项选择题

Jargon______academic publications, as writers seek to______the fact that they have scarce originality and scant insight.

(A) merits… announce
(B) infiltrates… relinquish
(C) dominates… camouflage
(D) hinders … admit
(E) plagues… exacerbate