单项选择题

The author believes that today's astronomy students ______.

A．are much brighter than students of a generation ago
B．no longer care about astronomical facts
C．are better-informed about the unseen worlds of space
D．may learn more about man and his research in various fields through the study of astronomy

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单项选择题

In the last paragraph, the underlined expression these developments refers to all of the following EXCEPT ______.

A．the development of science fiction and special effects of films
B．the new concepts about the universe acquired by today's astronomy students
C．the world-wide involvement in space exploration
D．humanity's new achievements in the field of astronomy

单项选择题

This passage is most probably taken from ______.

A．an article of popular science
B．the introduction of a book of astronomy
C．a lecture given by the author to astronomy students
D．the preface of a piece of science fiction