单项选择题

Questions 18 to 20 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.
Which of the following statements about lignin is CORRECT

A．It can be found in rags.
B．It can shorten the life expectancy of paper.
C．It is easy to separate lignin form wood pulp.
D．It is impossible to separate lignin from wood pulp.

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单项选择题

What does the woman say about their favorite player

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B．He can’t play well in a wet day.
C．No matter how hard the game will be, he always wins the game finally.
D．He lost last time because the court was slippery.

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The talk is mainly about ______.

A．computer lab services
B．college library facilities
C．the use of micro-computers
D．printouts from the laser printer

Questions 18 to 20 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. Which of the following statements about lignin is CORRECT 您的浏览器不支持 audio 元素。

Questions 18 to 20 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.
Which of the following statements about lignin is CORRECT