Around 150 B.C. the Greek astronomer Hipparchus developed a system to classify stars according to brightness.

Câu 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

* Đáp án

C

* Hướng dẫn giải

classify = categorize: phân loại

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