W: Very good. This is a very complex process. In fact, scientists who study human bones dont completely understand it yet. They are still trying to find out how it all actually works. Specifically, because sometimes after the first group of cells leaves a hole in the bone tissue, for some reason, the second group doesnt completely fill in the hole. And this can cause real problems. It can actually lead to a disease in which the bone becomes weak and is easily broken.
M: Ok, I get it. So if the scientists can figure out what makes the specialized cells work, maybe they can find a way to make sure the second group of cells completely fills the hole in the bone tissue every time. Thatll prevent the disease from ever occurring.
Questions 22 to 25 are based on the conversation you have just heard.
22. What is the conversation mainly about?
23. What is the function of the first group of specialized cells discussed in the conversation?
24. What does the woman say about scientists who study the specialized cells in human bones?
25. According to the man, what is one important purpose of studying specialized cells in human bones?
Section B
Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A), B), C) and D). Then mark the corresponding letter on Answer Sheet 2 with a single line through the centre.
【12月英语四级考试听力模拟试题十一】相关文章:
最新
2017-01-16
2016-10-21
2016-10-08
2016-10-08
2016-10-08
2016-10-08