The temperatures _________ take place vary widely for different materials.          

Câu hỏi :

The temperatures _________ take place vary widely for different materials.          

A which melting and freezing   

B at which melting and freezing

C which they melt and freeze  

D at which they melt and freeze

* Đáp án

D

* Hướng dẫn giải

Phương pháp giải:

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