Why does the author mention "a small flat-screen device" in the first paragraph?

Câu hỏi :

Why does the author mention "a small flat-screen device" in the first paragraph?

A to exemplify the e-cash system

B to criticize the e-cash system

C to praise the e-cash system

D to inform the e-cash system

* Đáp án

A

* Hướng dẫn giải

Phương pháp giải:

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