A “CAPTCHA” is a turing reCAPTCHA is a free service from Google that helps protect websites from spam and abuse. CAPTCHAs are a type of challenge–response test used on websites across the internet to determine whether a user is a human or a bot. 登录时忘记账号或密码，提示 APTCHA 的响应似乎无效，请在下方重新验证您不是机器人按以下步骤，亲测有效。 在电脑上操作会受浏览器和加速器的限制，建议直接手机操作，简单迅速 1、将手机调成使用移动数据，不要用Wifi（很重要） 2、复制此网址到微信上，直接在微信上点开， help. Muitos serviços da Web, incluindo o Google, usam o CAPTCHA para prevenir o acesso não autorizado a contas. By adding reCAPTCHA to a site, you can block automated software while helping your welcome users to enter with ease. Un test CAPTCHA est constitué de deux parties : une séquence aléatoire de lettres et/ou de chiffres qui apparaissent de manière déformée, et une zone de texte. com CAPTCHAs are a type of challenge–response test used on websites across the internet to determine whether a user is a human or a bot. It is easy for humans to solve, but hard for “bots” and other malicious software to figure out. A “CAPTCHA” is a turing. Pourquoi Google utilise-t-il les tests CAPTCHA ? 人機驗證 (Captcha，亦即全自動公開化圖靈測驗人機辨識) 是一種挑戰-回應式的安全驗證機制。這項機制會要求您完成簡單的測驗，證明自己是真人，而不是一台嘗試入侵密碼保護帳戶的電腦，藉此保護您遠離垃圾內容騷擾和密碼破解威脅。 人機驗證 (Captcha) 包含兩個簡單的部分：系統會以變形的圖片 O CAPTCHA funciona porque os computadores são capazes de criar uma imagem distorcida e processar uma resposta, mas não são capazes de ler ou de resolver o problema do mesmo modo que um ser humano para passar no teste.

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