According to the passage, what can radar detect besides location of objects

Câu hỏi :

Read the passage and choose the best answer.

A. Shape.            

B. Size.                 

C. Speed.              

D. Weight.  

* Đáp án

C

* Hướng dẫn giải

Giải thích: Dựa vào “Since human eyes are not very good at determining speeds of approaching objects, radar can show a pilot how fast nearby planes are moving.”

Đáp án  C

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