单项选择题


Questions 19 to 22 are based on the conversation you have just heard.

A．Discovering new life in space.
B．Studying meteorites.
C．Plotting the courses of asteroids.
D．Developing radar telescopes.
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单项选择题
The word demographic (Line 4, Para. 1 ) means ______.
A．statistics of human
B．surroundings study
C．accumulation of human
D．development of human
单项选择题
From the passage we can infer taboo is ______.
A．a strong desire to do something strange or terrible
B．a crime committed on impulse
C．behavior considered unacceptable in society’s eyes
D．an unfavorable impression left on other people
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