Question
20 to 20 are based on this passage
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Question 20
What is the purpose of the highlighted phrase?
A. It describes the basis of Galileo's theory.
B. It describes the scope of the passage.
C. It offers a brief summary of the theory.
D. It describes the topic of the passage.
E. It describes difference between Ptolemaic and geocentric cosmologies.
我的答案： 无