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 19 to 22 are based on the conversation you have just heard.
19. What is the discussion mainly about?
【解析】对话一开始就谈论人类骨骼的问题,女士说 But the fact is bones are made of dynamic living tissue that requires continuous maintenance and repair. 后面的对话都是针对这个话题展开的讨论,可见整个对话讨论的话题是骨头的自我修复能力。
20. What is the function of the first group of specialized cells discussed in the talk?
【解析】男士解释了第一组细胞的作用,第一组细胞生成一种化学物质分解骨组织,由此可见答案是They break down bone tissue.
21. What does the professor say about scientists who study the specialized cells in human bones?
【解析】女士说这种特殊细胞作用于人类骨头的过程相当复杂,事实上,连研究人类骨头的科学家都不能完全了解这个过程。从这一句中可以知道:In fact, the scientists who study human bones dont completely understand it yet. 所以答案即是这些科学家也不知道这些细胞如何工作。
【英语四级考试预测题听力阅读以及写作答案详解】相关文章:
最新
2017-01-16
2016-10-21
2016-10-08
2016-10-08
2016-10-08
2016-10-08