A galaxy, where (A) may include billions of (B) stars, is (C) held together (D) by g...

Câu hỏi :

A galaxy, where (A) may include billions of (B) stars, is (C) held together (D) by gravitation attraction

A where 

B of

C is

D together

* Đáp án

A

* Hướng dẫn giải

Phương pháp giải:

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