問題詳情
9. How have CAPTCHAs been made more challenging?
(A) By making some of the letters backwards.
(B) By using forms of animals and other objects.
(C) By drawing pictures about person.
(D) By asking private questions.
(A) By making some of the letters backwards.
(B) By using forms of animals and other objects.
(C) By drawing pictures about person.
(D) By asking private questions.
參考答案
無參考答案
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