听力音频：
Questions 31-40
Complete the sentence below win ONE WORD ONLY.
Biomimicry
History:
In the past, arctic people copied 31. ______ skills from poiar bears.
Spider:
dragline silk is much stronger than 32. ______
More resilient than synthetic fiber but finer than human 33. ______
Biodegradable
Applications
Artificial silk is used to create environmentally friendly equipment for 34. ______
It is used as a medical solution for repairing 35. ______ injuries.
Medical stitches using silk can cause less 36. ______
Owl:
Can solve the problem: 37. ______ of a high speed train can be reduced.
Other uses include on planes and skating 38. ______ used in Olympics.
Kingfisher:
It can solve the problem of train vibration at the end of a 39. ______
Shape of the beak reduces the loss of 40. ______
答案
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