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

Phương pháp giải:

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