Question

     Wearing a light blue wetsuit (潜水衣) that matches the colour of the sea will make you less likely to be attacked by a shark,according to researchers. Sharks eat meat like dolphins,seals and whales,but they are unable to distinguish between colours. They are completely colour blind and only see things clearly if their colours are mostly light or dark,scientists claimed. It is hugely beneficial to divers sailing in shark-filled waters. Costumes or wetsuits that disguise (掩蔽) swimmers’ bodies in the sea water are less likely to draw a shark's attention than ones with bright colours.

     Professor Nathan Hart,from the University of Western Australia,said,n It's the high contrast against the water that is probably attractive to sharks. So you’d better wear less bright colours or colours that match the background in the water."

     The U. S. Navy has made tests that suggested sharks were able to see yellow most clearly. The tests were to see what would be the best colour for the life jackets (救生衣) that pilots wear in case they have to splash down into the ocean. Professor Hart said it was the high degree of yellow,but not the colour itself that would increase the visibility (能见度) of sharks. He said, " It may be possible to design swimming suits and surf crafts that have a lower visual contrast (视觉对比) to sharks. Therefore they are less attractive to them."

53. What did scientists find about sharps?

   A. They can't see anything.

   B. They can see all the colours.

   C. They can't distinguish between colours.

   D. They can see blue and yellow most clearly.

54. According to the passage,which of the following is the best to wear in the sea?

   A. A bright blue wetsuit. B. A light wetsuit.

   C. A yellow wetsuit. D. A less bright wetsuit.

55. According to the passage,what is the main reason that would increase the visibility of sharks?

   A. A high visual contrast.

   B. A low visual contrast.

   C. The colour itself.

   D. The colour of the sea water.

Answer 1

53. C 54. D 55. A

[阅读D篇短文大意]经科学家们研究证实，倘若在海底身 穿淡蓝色或与海水颜色相近的潜水服，可以降低被鲨鱼攻击的几率。因为科学家们发现鲨鱼天生是色盲，它们只能看清楚深色或 者浅色的东西，而与海水颜色相近的事物却是看不清的。

53. C 根据文章第 一段中的"... they are unable to distinguish between colours. They are completely colour blind and only see things clearly if their colours are mostly light or dark,scientists claimed"可知答案选   C.

54. D 根据文章第二段中的"So you’d better wear less bright colours or colours that match the background in the water” 可知答案选D

55. A 根据文章第三段中的illwas the high degree of yellow,but not the colour itself that would increase the visibility (能见 度) of sharks” 和"It may be possible to design swimming suits and surf craft that have a lower visual contrast (视觉对比) to sharks"可知答案选A.