The scales on sharks are tiny, rough, tooth-like structures. This makes their skin feel like armor and helps the sharks _(1)_ quickly and gracefully through the water. For many years now, humans _(2)_ shark skin in different products. _(3)_ sharkskin fabric is very light and does not wrinkle easily, which makes it ideal for suits, curtains, and tablecloths. Other things that have been made with sharkskin fabric are diving suits and winter coats. The biggest technological advancement that is related _(4)_ shark skin in recent years is paint. This new kind of paint, which has been inspired by theefficiency of shark skin, can be applied to airplanes, ships, and wind turbines. By doing so, wind drag is reduced. This means that fuel costs for boats and planes are reduced and money is saved. On wind turbines, less air _(5)_ means that more energy is generated, making them more efficient. The best things about sharkskin paint are that very little extra weight is added to the ships, planes, and wind turbines and it can resist ultraviolet radiation and extreme temperatures. There are particles in the paint that recreate the shark-skin like quality, but it needs to be applied properly with stencils. The researchers in Germany whocame up with the paint tested it on ships. They found that the paint reduces dragby five percent. On large container ships, this could save 2,000 tons of fuel. If this paint were applied to every plane in the world, 4.48 million tons of fuel _(6)_ every year. That would reduce carbon dioxide emissions, and when it comes to_(7)_ the environment, every little bit helps.
1. (A) move (B) moved (C) moving (D) moves 2. (A) copy (B) copied (C) are copying (D) have been copying 3. (A) Confident (B) Artificial (C) Doubtful (D) Pessimistic 4. (A) with (B) on (C) to (D) as 5. (A) management (B) resistance (C) separation (D) admission 6. (A) will save (B) would save (C) will be saved (D) would be saved 7. (A) protecting (B) violating (C) harvesting (D) observing
|
留言列表