Nguyễn Sơn Quân
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Hỏi:
Around 150 B.C. the Greek astronomer Hipparchus developed a system to classify stars according to brightness.
A. record
B. shine
C. categorize
D. diversify
Around 150 B.C. the Greek astronomer Hipparchus developed a system to classify stars according to brightness.
A. record
B. shine
C. categorize
D. diversify