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.

答案：登入後查看
統計： A(2), B(23), C(1), D(2), E(0) #2344752

詳解 (共 1 筆)

#6479081
9. How have CAPTCHAs been made more challenging?
✅ (B) By using forms of animals and other objects.
✔ 文中說明：「Images, such as cats, dogs, cars, and houses are now used」→ 以圖片取代文字 CAPTCHA。
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