单项选择题

The passage is primarily concerned with

(A) describing an important technique
(B) discussing a new method
(C) investigating a controversial procedure
(D) announcing a significant discovery
(E) promoting a novel application
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单项选择题
Which of the following best describes the organization of the passage
(A) A method is criticized, and an alternative is suggested.
(B) An illustration is examined, and some errors are exposed.
(C) An assertion is made and a procedure is outlined.
(D) A series of examples is presented, and a conclusion is drawn.
(E) A hypothesis is advanced, and supporting evidence is supplied.
单项选择题
According to the passage, in the Cepheid variable method all of the following have a significant role in the calculation of the distance of a galaxy EXCEPT
(A) The intrinsic luminosity of a Cepheid
(B) The comparative luminosity of ordinary stars
(C) The observed brightness of the Cepheid
(D) The data suggesting the expansion of the universe
(E) The correction of the period-luminosity relation for the star being observed
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