单项选择题

Questions 17 to 20 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions. Now, listen to the passage.
What is the main purpose of the talk

A．To explain why people become scientists.
B．To describe different scientific disciplines.
C．To persuade students to become biologists.
D．To introduce students to the cours

<上一题目录下一题>

热门试题

单项选择题

What does John ask Susan to do

A．Help with a term paper.
B．Go to a concert.
C．Take care of his cousin.
D．Arrange his cousin’s interview.

单项选择题

What are the speakers mainly discussing

A．A chemistry assignment.
B．A study that their chemistry professor did.
C．A class that the woman is taking.
D．A job possibility.

Questions 17 to 20 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions. Now, listen to the passage. What is the main purpose of the talk 您的浏览器不支持 audio 元素。

Questions 17 to 20 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions. Now, listen to the passage.
What is the main purpose of the talk