중3 지학 민찬규 3과 본문 변형문제

From flying birds to ____ plants, the way nature works fascinates us.

Some people not ____ use nature but also imitate it to find solutions to their problems.

Leonardo da Vinci (1452-1519) was ____ such person.

He wondered how birds ____ fly.

He closely watched birds, made notes, and ____ pictures of them.

Even though his invention was not successful, he imitated a bird’s wings to try to ____ a flying machine.

Since then, more and more people ____ successfully imitated the surprising abilities of nature’s genius.

____ explore some of them.

The ____ train was first made in Japan.

But it ____ one problem.

When the train entered a tunnel, the ____ increase in air pressure created a very loud sound.

It often woke people up and ____ headaches.

A team of engineers ____ to solve the problem, but they didn’t know how they could reduce the noise.

One day, one of the engineers was watching a bird in search of a ____.

He saw the bird ____ and quietly diving into the water.

He wondered how the ____ entered the water so gracefully.

So, he studied more about the bird and discovered ____ long, narrow beak.

He redesigned the front of the ____ by imitating the bird’s beak.

It was ____.

____ the new train travels not only more quietly but also 10% faster with 15% less electricity.

One day, a Swiss engineer, George de Mestral, was hiking in the ____ with his dog.

On his way ____, he saw that burrs were stuck to his clothes and his dog’s hair.

He ____ to know how that happened.

He took a closer look at the burrs and noticed that the ____ of the burr needles were not straight.

He wondered if he could ____ that to make something useful.

After a lot of ____, he finally invented two new materials.

One had many tiny needles like ____ of burrs and the other had a hairy surface.

When they were pressed together, they ____ a very good fastener.

It was ____ only strong but also easy to use.

Since then, many ____ have used his invention in many different ways.

It is often used for ____, shoes, and bags.

Some people ____ it to play a number of different games.

In space, it keeps things from ____ away.

There is nothing ____ in nature.

We just have to become ____ and ask questions.