From Paragraph 2, we can infer all the following statements EXCEPT that
A. extension of a patent"s life-span is usually limited
B. if there is no reward for a patent, extension can be granted
C. an extension cannot be longer than 32 years
D. few patents of invention can be granted an extension
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In Paragraph 1, the author explains the concept of the greenhouse effect by
A. identifying different causes of global warming
B. comparing the scientific concept to a familiar human experience
C. arguing that the greenhouse effect results in global warming
D. describing how the greenhouse effect is formed
The authors description of external time cues mentions all of the following EXCEPT
A. light
B. temperature
C. humidity
D. weather
The phrase the former in Paragraph 4 refers to______.
A. the colonial system
B. the richer countries
C. labor and resources
D. the poorer countries
Why does the professor pose so many questions to the students in this beginning class？
A. To help explain the difficulties in this course.
B. To help explain why the class will take a long time to finish.
C. To give a good demonstration of the diversity of biological study.
D. To give an oral test of the students" general knowledge about biology.
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