Unit7知识点-A部分练习 2025-2026学年沪外教版八年级英语下册

八年级英语下册Unit7知识点-A部分练习 小试牛刀 A. 选用方框中的短语填空（每个限用一次） | password | captchas | face recognition | data backup | fingerprint recognition | 1. A __________ is a secret word or phrase that you set to protect your accounts. 2. __________ are little tests such as solving math problems or clicking photos with dogs. 3. A computer can use __________ to recognise people by analysing their facial features. 4. __________ can also be used to unlock phones or computers. 5. People use __________ to make copies of important information to avoid data loss. B. 句型转换（改为一般疑问句并作肯定或否定回答） 1. You should set a strong password for your online accounts. 一般疑问句：________________________________________________ 肯定回答：________________ 否定回答：________________ 2. Hackers crack passwords to steal money or information. 一般疑问句：________________________________________________ 肯定回答：________________ 否定回答：________________ 3. You can use face recognition to unlock your phone. 一般疑问句：________________________________________________ 肯定回答：________________ 否定回答：________________ 配套练习 A. 单项选择（★） 从A、B、C、D中选择最佳答案。 1. Which of the following is a weak password? A. 12$@mNq B. 12345 C. P@ssw0rd! D. X9#kL2$m 2. What are captchas used for? A. To recognise faces. B. To test if a user is human. C. To back up data. D. To unlock phones. 3. Why do hackers crack passwords? A. To help people. B. To steal money or information. C. To improve security. D. To test their skills legally. 4. What should you do to keep your data safe? A. Use the same password for all accounts. B. Share your password with friends. C. Use a mix of letters, numbers and symbols in your password. D. Never change your password. 5. What does “data backup” mean? A. Deleting old files. B. Making copies of important information to prevent data loss. C. Sharing data online. D. Setting a screen lock. B. 完成句子（★★） 根据句子内容，用正确的词汇完成句子。 1. 密码是用来保护账户安全的秘密词或短语。 A __________ is a secret word or phrase that you set to __________ your accounts. 2. 验证码是对人类来说容易但对计算机来说困难的小测试。 __________ are little tests that are __________ for humans, but __________ for a computer. 3. 面部识别通过分析面部特征来识别人。 __________ recognition can recognise people by analysing their __________ features. 4. 不要在网上分享个人信息时那么粗心。 Don’t be so __________ when sharing __________ information online. 5. 为每个账户使用不同的强密码。 Use a __________ password for each __________. 拓展思考 Part 1（描述你如何保护自己的在线账户安全） 写一段话（至少5句）。你使用强密码吗？你会定期更改密码吗？你会使用双重验证或指纹识别吗？ 使用以下表达：To keep my accounts safe, I always ... I never ... I also use ... I think it is important to ... __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ Part 2（给同学写一段话，建议他们如何创建强密码） 写一段话（至少5句）。 使用以下表达：A strong password should include ... You should avoid using ... It is better to ... Remember to ... __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ Part 3（讨论：为什么定期备份数据很重要？） 写一段话（至少5句）。 使用以下表达：Backing up data is important because ... If your computer crashes or gets a virus, you may ... You can use ... I think ... __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ 参考答案与解析 小试牛刀 A 1. password 2. Captchas 3. face recognition 4. Fingerprint recognition 5. data backup 小试牛刀 B 1. Should I set a strong password for your online accounts? Yes, I should. / No, I shouldn’t. 2. Do hackers crack passwords to steal money or information? Yes, they do. / No, they don’t. 3. Can you use face recognition to unlock your phone? Yes, I can. / No, I can’t. 配套练习 A 1. B 2. B 3. B 4. C 5. B 配套练习 B 1. password, protect 2. Captchas, easy, hard 3. Face, facial 4. careless, personal 5. strong, account 拓展思考（示例） Part 1 To keep my accounts safe, I always use a different strong password for each account. I never use simple words like “password” or “12345”. I also use fingerprint recognition on my phone. I think it is important to change passwords every few months and never share them with anyone. Part 2 A strong password should include a mix of uppercase and lowercase letters, numbers, and symbols. You should avoid using your name, birthday, or common words. It is better to use a long passphrase like “MyDogLoves2Eat!”。 Remember to use different passwords for different accounts. Part 3 Backing up data is important because you never know when your computer might crash or get a virus. If you lose your files, you may not be able to recover them. You can use an external hard drive or cloud storage for backup. I think regular backups save you from a lot of trouble and stress. 1 学科网（北京）股份有限公司 $