46. What do we learn about Knowledge-Based Artificial Intelligence?
- A. It is a robot that can answer students' questions.
- B. It is a course designed for students to learn online.
- C. It is a high-tech device that revolutionizes teaching.
- D. It is a computer program that aids student learning.
答案：B
答案句：Professor Ashok Goel of Georgia Tech developed an artificially intelligent teaching assistant to help handle the enormous number of student questions in the online class, Knowledge-Based Artificial Intelligence. This online course is a core requirement of Georgia Tech's online Master of Science in Computer Science program Profess
参考译文：佐治亚理工学院的阿肖克·戈尔教授开发了一个人工智能助教，以帮助处理在线课程《基于知识的人工智能》中海量的学生问题。这门在线课程是佐治亚理工学院在线计算机科学硕士项目的核心要求。
定位线索：题干“Knowledge-Based Artificial Intelligence”→答案句取自第1段“the online class, Knowledge-Based Artificial Intelligence”和“This online course”；文中“online course”对应选项B“a course designed for students to learn online”。
解析：题干问关于《基于知识的人工智能》我们了解到什么。答案句明确指出它是“online class”和“online course”，即一门在线课程，因此正确选项B是对原文的直接同义转述。选项A、C、D都将其描述为机器人、设备或程序，属于偷换概念，原文中人工智能助教是另一事物，并非该课程本身。
47. What problem did Professor Goel meet with?
- A. His students were unsatisfied with the assistants.
- B. His course was too difficult for the students.
- C. Students' questions were too many to handle.
- D. Too many students dropped out of his course.
答案：C
答案句：Professor Goel already had eight teaching assistants, but that wasn't enough to deal with the overwhelming number of daily questions from students.
参考译文：戈尔教授已经有八名助教，但这不足以应对学生每天提出的海量问题。
定位线索：题干“What problem did Professor Goel meet with”→答案句取自第1段“that wasn't enough to deal with the overwhelming number of daily questions”；文中“overwhelming number”对应选项C“too many to handle”。
解析：题干问戈尔教授遇到的问题。答案句明确指出八名助教不足以应对“overwhelming number of daily questions”，即问题太多无法处理，因此正确选项C是对原文的同义转述。选项A“学生不满意助教”在原文无依据，属于无中生有；选项B“课程太难”和D“太多学生退课”虽在文中提及，但退课是问题导致的结果而非教授直接面临的问题，且课程难度未提及，均属答非所问或偷换概念。
50. What does Professor Goel plan to do next with Jill Watson?
- A. Launch different versions of her online.
- B. Feed her with new questions and answers.
- C. Assign her to answer more of students' questions.
- D. Encourage students to interact with her more freely.
答案：C
答案句：The goal of Professor Goel's virtual assistant next year is to take over answering 40% of all the questions posed by students on the online forum.
参考译文：戈尔教授虚拟助教明年的目标是接管回答学生在在线论坛上提出的所有问题中的40%。
定位线索：题干“What does Professor Goel plan to do next with Jill Watson”→答案句取自第4段“The goal of Professor Goel's virtual assistant next year is to take over answering 40% of all the questions”；文中“take over answering 40%”对应选项C“answer more of students' questions”。
解析：题干问戈尔教授接下来计划用吉尔·沃森做什么。答案句明确指出明年目标是“take over answering 40% of all the questions”，即接管回答更多问题，因此正确选项C是对原文的同义转述。选项A“发布不同版本”在原文未提，属于无中生有；选项B“给她喂新问题和答案”是过去的行为而非未来计划，属于答非所问；选项D“鼓励学生更自由互动”原文未提，属于无中生有。