1 . Welcome

This course explores the concepts and algorithms (算法) at the foundation of modern artificial intelligence, diving into the ideas that give rise to technologies like game-playing engines, handwriting recognition, and machine translation. Through hands-on projects, students gain exposure to the theory behind graph search algorithms, classification, and other topics in artificial intelligence and machine learning as they incorporate them into their own Python programs. By course’s end, students emerge with experience in libraries for machine learning as well as knowledge of artificial intelligence principles that enable them to design intelligent systems of their own.

Requirement

CS50x or at least one year of experience with Python.

How to Take this Course

Even if you are not a student at Harvard, you are welcome to “take” this course for free via this OpenCourseWare by working your way through the course’s seven weeks of material. If you’d like to submit the course’s seven projects for feedback, be sure to create an edX account, if you haven’t already. Ask questions along the way via any of the course’s communities!

If interested in a verified (认证的) certificate from edX enroll at cs50.edx.org/ai instead.

If interested in a professional certificate from edX, enroll at cs50.edx.org programs/ai instead.

If interested in transfer credit and accreditation from Harvard Extension School, register at web.dce.harvard.edu/extension/csci/e/80 instead.

If interested in transfer credit and accreditation from Harvard Summer School, register at web.dce.harvard.edu/summer/csci/s/80 instead.

You are free to:

Share — copy and redistribute the material in any medium or format

Adapt — remix, transform, and build upon the material

1. What does the course focus on?

A．Diving into the ideas that give rise to handwriting recognition.

B．Teaching the concepts and algorithms of artificial intelligence.

C．Offering learning or teaching materials on artificial intelligence.

D．Providing students with experience in library for machine learning,

2. Who will enroll at cs50.edx.org/programs/ai?

A．A student interested in an authorized certificate from edX.

B．A student interested in a professional certificate from edX.

C．A student interested in transfer credit from Harvard Extension School.

D．A student interested in transfer credit from Harvard Summer School.

3. What can we learn from this passage?

A．Students can integrate the materials into their own program.

B．Teachers can use the course’s materials without restriction.

C．Any student without related experience can take this course.

D．Students must create a new edX account for taking the course.

4 . 阅读下面材料，根据其内容和所给段落开头语续写两段，使之构成一篇完整的短文。续写的词数应为150左右。

When I was young, I always dreamed of playing the piano and giving performances to a large audience in a concert hall. However, I struggled to understand the musical notes and the theory. Despite my parents’ encouragement and offer of piano lessons, I pretended not to be interested, too afraid to try.

Many years passed until one day, at 25 years old, I heard that a new piano studio had opened in my neighborhood. The teacher was recruiting (招收) new students. My childhood dream came flooding back.

I remembered I had initially feared becoming a teacher after graduation. However, I overcame those doubts. I refused to let fear hold me back any longer, so I walked into the studio.

The teacher, Deb, welcomed me warmly. I was relieved to find we were contemporaries (同时代的人) and expressed my desire to play the works of Bach and Beethoven if I could overcome my fear. Deb understood and seemed sincere, so I signed up for 3 months of classes. Still doubtful about my commitment, I bought a small, tabletop electric organ to practice with at home. It wasn’t the same as a real piano, but enabled me to learn some basics.

Week by week, I attended lessons in Deb’s studio. I often passed young students on their way out from their lessons before mine. One day, noticing the textbooks in my bag, a child stopped me and asked, “Where’s your boy?” After some hesitation, I finally answered I was the student. The children then welcomed me and I sat in the studio and listened to a piece a child was working on.

Soon, I gained confidence and upgraded to a full-size piano at home for daily practice. After three rewarding years of lessons with Deb, she announced it was time for me and other students to prepare for a recital (钢琴演奏会) on stage. I was thrilled at the chance to finally fulfill my childhood dream, yet also anxious at the thought of performing before the audience. But Deb believed in me. “Look how far you’ve come,” she encouraged. “It’s time to share your gift with others.”

Paragraph 1:

I shook my head and told her, “No, thanks.”

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Paragraph 2:

When I finally finished my performance, I faced the audience and bowed.

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5 . 假定你是李华，是红星中学高二年级的学生。最近你们年级的同学参加了社会实践，外教老师Jason对此很感兴趣，请你给他写一封邮件，分享这次经历，内容包括：
1. 实践内容；
2. 体验和感受。
注意：1. 词数80左右；
2. 请按如下格式在答题卡的相应位置作答。
参考词汇：
戏曲欣赏 opera appreciation       插秧 transplanting rice seedlings
扎筏 raft making       篝火 camping fire
Dear Jason,
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Yours,

Li Hua