单项选择题

Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now, listen to the passage. What is the main purpose of the passage you have just heard

A．To discuss different concepts.
B．To introduce a new methodology.
C．To talk about conceptual systems.
D．To introduce a research paper.

<上一题目录下一题>

热门试题

单项选择题

单项选择题

Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now, listen to the passage. What is the main purpose of the passage you have just heard 您的浏览器不支持 audio 元素。